Home / 261,125.45-391,688.18-172,358.19

Finding the Fourth Proportional to 261,125.45, 391,688.18 and 172,358.19

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Solution

The fourth proportional to 261,125.45, 391,688.18 and 172,358.19 is: 258,537.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,125.45 : 391,688.18 = 172,358.19 : x
  2. Step 2: Convert to fraction form
    261,125.45/391,688.18 = 172,358.19/x
  3. Step 3: Cross multiply
    261,125.45x = 391,688.18 × 172,358.19
  4. Step 4: Simplify right side
    261,125.45x = 67,510,664,887.40
  5. Step 5: Solve for x
    x = 67,510,664,887.40/261,125.45
  6. Step 6: Final answer
    x = 258,537.29

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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.