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Finding the Fourth Proportional to 486,987.30, 730,480.95 and 412,337.70

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Solution

The fourth proportional to 486,987.30, 730,480.95 and 412,337.70 is: 618,506.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,987.30 : 730,480.95 = 412,337.70 : x
  2. Step 2: Convert to fraction form
    486,987.30/730,480.95 = 412,337.70/x
  3. Step 3: Cross multiply
    486,987.30x = 730,480.95 × 412,337.70
  4. Step 4: Simplify right side
    486,987.30x = 301,204,834,816.82
  5. Step 5: Solve for x
    x = 301,204,834,816.82/486,987.30
  6. Step 6: Final answer
    x = 618,506.55

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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.