Home / 261,003.40-391,505.10-172,429.90

Finding the Fourth Proportional to 261,003.40, 391,505.10 and 172,429.90

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Solution

The fourth proportional to 261,003.40, 391,505.10 and 172,429.90 is: 258,644.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,003.40 : 391,505.10 = 172,429.90 : x
  2. Step 2: Convert to fraction form
    261,003.40/391,505.10 = 172,429.90/x
  3. Step 3: Cross multiply
    261,003.40x = 391,505.10 × 172,429.90
  4. Step 4: Simplify right side
    261,003.40x = 67,507,185,242.49
  5. Step 5: Solve for x
    x = 67,507,185,242.49/261,003.40
  6. Step 6: Final answer
    x = 258,644.85

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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.