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Finding the Fourth Proportional to 485,517.25, 728,275.88 and 153,093.25

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Solution

The fourth proportional to 485,517.25, 728,275.88 and 153,093.25 is: 229,639.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,517.25 : 728,275.88 = 153,093.25 : x
  2. Step 2: Convert to fraction form
    485,517.25/728,275.88 = 153,093.25/x
  3. Step 3: Cross multiply
    485,517.25x = 728,275.88 × 153,093.25
  4. Step 4: Simplify right side
    485,517.25x = 111,494,121,365.81
  5. Step 5: Solve for x
    x = 111,494,121,365.81/485,517.25
  6. Step 6: Final answer
    x = 229,639.88

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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.