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Finding the Fourth Proportional to 486,952.40, 729,116.40 and 381,976.40

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Solution

The fourth proportional to 486,952.40, 729,116.40 and 381,976.40 is: 571,935.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,952.40 : 729,116.40 = 381,976.40 : x
  2. Step 2: Convert to fraction form
    486,952.40/729,116.40 = 381,976.40/x
  3. Step 3: Cross multiply
    486,952.40x = 729,116.40 × 381,976.40
  4. Step 4: Simplify right side
    486,952.40x = 278,505,257,652.96
  5. Step 5: Solve for x
    x = 278,505,257,652.96/486,952.40
  6. Step 6: Final answer
    x = 571,935.28

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Double scale
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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.