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Finding the Fourth Proportional to 261,083.60, 391,672.92 and 172,411.28

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Solution

The fourth proportional to 261,083.60, 391,672.92 and 172,411.28 is: 258,648.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,083.60 : 391,672.92 = 172,411.28 : x
  2. Step 2: Convert to fraction form
    261,083.60/391,672.92 = 172,411.28/x
  3. Step 3: Cross multiply
    261,083.60x = 391,672.92 × 172,411.28
  4. Step 4: Simplify right side
    261,083.60x = 67,528,829,478.54
  5. Step 5: Solve for x
    x = 67,528,829,478.54/261,083.60
  6. Step 6: Final answer
    x = 258,648.30

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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.