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Finding the Fourth Proportional to 621,706.77, 932,560.08 and 172,427.64

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Solution

The fourth proportional to 621,706.77, 932,560.08 and 172,427.64 is: 258,641.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,706.77 : 932,560.08 = 172,427.64 : x
  2. Step 2: Convert to fraction form
    621,706.77/932,560.08 = 172,427.64/x
  3. Step 3: Cross multiply
    621,706.77x = 932,560.08 × 172,427.64
  4. Step 4: Simplify right side
    621,706.77x = 160,799,133,752.61
  5. Step 5: Solve for x
    x = 160,799,133,752.61/621,706.77
  6. Step 6: Final answer
    x = 258,641.44

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Double scale
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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.