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Finding the Fourth Proportional to 519,517.80, 779,276.70 and 145,492.20

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Solution

The fourth proportional to 519,517.80, 779,276.70 and 145,492.20 is: 218,238.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,517.80 : 779,276.70 = 145,492.20 : x
  2. Step 2: Convert to fraction form
    519,517.80/779,276.70 = 145,492.20/x
  3. Step 3: Cross multiply
    519,517.80x = 779,276.70 × 145,492.20
  4. Step 4: Simplify right side
    519,517.80x = 113,378,681,491.74
  5. Step 5: Solve for x
    x = 113,378,681,491.74/519,517.80
  6. Step 6: Final answer
    x = 218,238.30

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Double scale
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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.