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Finding the Fourth Proportional to 539,142.40, 808,713.60 and 434,166.40

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Solution

The fourth proportional to 539,142.40, 808,713.60 and 434,166.40 is: 651,249.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,142.40 : 808,713.60 = 434,166.40 : x
  2. Step 2: Convert to fraction form
    539,142.40/808,713.60 = 434,166.40/x
  3. Step 3: Cross multiply
    539,142.40x = 808,713.60 × 434,166.40
  4. Step 4: Simplify right side
    539,142.40x = 351,116,272,343.04
  5. Step 5: Solve for x
    x = 351,116,272,343.04/539,142.40
  6. Step 6: Final answer
    x = 651,249.60

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Half scale
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Double scale
Find fourth proportional to 539,143.40, 808,715.10 and 434,167.40
Similar ratio
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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.