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Finding the Fourth Proportional to 539,142.20, 808,713.30 and 329,190.20

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Solution

The fourth proportional to 539,142.20, 808,713.30 and 329,190.20 is: 493,785.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,142.20 : 808,713.30 = 329,190.20 : x
  2. Step 2: Convert to fraction form
    539,142.20/808,713.30 = 329,190.20/x
  3. Step 3: Cross multiply
    539,142.20x = 808,713.30 × 329,190.20
  4. Step 4: Simplify right side
    539,142.20x = 266,220,492,969.66
  5. Step 5: Solve for x
    x = 266,220,492,969.66/539,142.20
  6. Step 6: Final answer
    x = 493,785.30

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Half scale
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Double scale
Find fourth proportional to 539,143.20, 808,714.80 and 329,191.20
Similar ratio
Find fourth proportional to 808,713.30, 1,213,069.95 and 493,785.30
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.