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Finding the Fourth Proportional to 261,266.58, 391,235.13 and 172,250.01

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Solution

The fourth proportional to 261,266.58, 391,235.13 and 172,250.01 is: 257,936.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,266.58 : 391,235.13 = 172,250.01 : x
  2. Step 2: Convert to fraction form
    261,266.58/391,235.13 = 172,250.01/x
  3. Step 3: Cross multiply
    261,266.58x = 391,235.13 × 172,250.01
  4. Step 4: Simplify right side
    261,266.58x = 67,390,255,054.85
  5. Step 5: Solve for x
    x = 67,390,255,054.85/261,266.58
  6. Step 6: Final answer
    x = 257,936.76

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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.