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Finding the Fourth Proportional to 508,730.80, 763,096.20 and 390,996.40

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Solution

The fourth proportional to 508,730.80, 763,096.20 and 390,996.40 is: 586,494.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,730.80 : 763,096.20 = 390,996.40 : x
  2. Step 2: Convert to fraction form
    508,730.80/763,096.20 = 390,996.40/x
  3. Step 3: Cross multiply
    508,730.80x = 763,096.20 × 390,996.40
  4. Step 4: Simplify right side
    508,730.80x = 298,367,867,053.68
  5. Step 5: Solve for x
    x = 298,367,867,053.68/508,730.80
  6. Step 6: Final answer
    x = 586,494.60

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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.