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Finding the Fourth Proportional to 486,422.70, 729,634.05 and 153,998.70

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Solution

The fourth proportional to 486,422.70, 729,634.05 and 153,998.70 is: 230,998.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,422.70 : 729,634.05 = 153,998.70 : x
  2. Step 2: Convert to fraction form
    486,422.70/729,634.05 = 153,998.70/x
  3. Step 3: Cross multiply
    486,422.70x = 729,634.05 × 153,998.70
  4. Step 4: Simplify right side
    486,422.70x = 112,362,695,175.74
  5. Step 5: Solve for x
    x = 112,362,695,175.74/486,422.70
  6. Step 6: Final answer
    x = 230,998.05

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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.