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Finding the Fourth Proportional to 485,809.80, 728,714.70 and 367,711.80

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Solution

The fourth proportional to 485,809.80, 728,714.70 and 367,711.80 is: 551,567.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,809.80 : 728,714.70 = 367,711.80 : x
  2. Step 2: Convert to fraction form
    485,809.80/728,714.70 = 367,711.80/x
  3. Step 3: Cross multiply
    485,809.80x = 728,714.70 × 367,711.80
  4. Step 4: Simplify right side
    485,809.80x = 267,956,994,023.46
  5. Step 5: Solve for x
    x = 267,956,994,023.46/485,809.80
  6. Step 6: Final answer
    x = 551,567.70

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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.