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Finding the Fourth Proportional to 527,616.60, 791,424.90 and 172,642.20

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Solution

The fourth proportional to 527,616.60, 791,424.90 and 172,642.20 is: 258,963.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,616.60 : 791,424.90 = 172,642.20 : x
  2. Step 2: Convert to fraction form
    527,616.60/791,424.90 = 172,642.20/x
  3. Step 3: Cross multiply
    527,616.60x = 791,424.90 × 172,642.20
  4. Step 4: Simplify right side
    527,616.60x = 136,633,335,870.78
  5. Step 5: Solve for x
    x = 136,633,335,870.78/527,616.60
  6. Step 6: Final answer
    x = 258,963.30

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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.