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Finding the Fourth Proportional to 485,599.80, 728,399.70 and 153,175.80

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Solution

The fourth proportional to 485,599.80, 728,399.70 and 153,175.80 is: 229,763.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,599.80 : 728,399.70 = 153,175.80 : x
  2. Step 2: Convert to fraction form
    485,599.80/728,399.70 = 153,175.80/x
  3. Step 3: Cross multiply
    485,599.80x = 728,399.70 × 153,175.80
  4. Step 4: Simplify right side
    485,599.80x = 111,573,206,767.26
  5. Step 5: Solve for x
    x = 111,573,206,767.26/485,599.80
  6. Step 6: Final answer
    x = 229,763.70

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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.