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Finding the Fourth Proportional to 486,974.90, 730,462.35 and 287,390.90

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Solution

The fourth proportional to 486,974.90, 730,462.35 and 287,390.90 is: 431,086.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,974.90 : 730,462.35 = 287,390.90 : x
  2. Step 2: Convert to fraction form
    486,974.90/730,462.35 = 287,390.90/x
  3. Step 3: Cross multiply
    486,974.90x = 730,462.35 × 287,390.90
  4. Step 4: Simplify right side
    486,974.90x = 209,928,232,182.62
  5. Step 5: Solve for x
    x = 209,928,232,182.62/486,974.90
  6. Step 6: Final answer
    x = 431,086.35

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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.