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Finding the Fourth Proportional to 453,520.20, 680,280.30 and 391,312.20

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Solution

The fourth proportional to 453,520.20, 680,280.30 and 391,312.20 is: 586,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,520.20 : 680,280.30 = 391,312.20 : x
  2. Step 2: Convert to fraction form
    453,520.20/680,280.30 = 391,312.20/x
  3. Step 3: Cross multiply
    453,520.20x = 680,280.30 × 391,312.20
  4. Step 4: Simplify right side
    453,520.20x = 266,201,980,809.66
  5. Step 5: Solve for x
    x = 266,201,980,809.66/453,520.20
  6. Step 6: Final answer
    x = 586,968.30

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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.