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Finding the Fourth Proportional to 485,280.15, 727,920.23 and 399,659.10

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Solution

The fourth proportional to 485,280.15, 727,920.23 and 399,659.10 is: 599,488.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,280.15 : 727,920.23 = 399,659.10 : x
  2. Step 2: Convert to fraction form
    485,280.15/727,920.23 = 399,659.10/x
  3. Step 3: Cross multiply
    485,280.15x = 727,920.23 × 399,659.10
  4. Step 4: Simplify right side
    485,280.15x = 290,919,941,995.30
  5. Step 5: Solve for x
    x = 290,919,941,995.30/485,280.15
  6. Step 6: Final answer
    x = 599,488.65

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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.