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Finding the Fourth Proportional to 621,728.79, 932,593.10 and 172,449.66

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Solution

The fourth proportional to 621,728.79, 932,593.10 and 172,449.66 is: 258,674.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,728.79 : 932,593.10 = 172,449.66 : x
  2. Step 2: Convert to fraction form
    621,728.79/932,593.10 = 172,449.66/x
  3. Step 3: Cross multiply
    621,728.79x = 932,593.10 × 172,449.66
  4. Step 4: Simplify right side
    621,728.79x = 160,825,362,151.10
  5. Step 5: Solve for x
    x = 160,825,362,151.10/621,728.79
  6. Step 6: Final answer
    x = 258,674.47

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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.