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Finding the Fourth Proportional to 261,577, 392,369.15 and 74,588.50

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Solution

The fourth proportional to 261,577, 392,369.15 and 74,588.50 is: 111,883.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,577 : 392,369.15 = 74,588.50 : x
  2. Step 2: Convert to fraction form
    261,577/392,369.15 = 74,588.50/x
  3. Step 3: Cross multiply
    261,577x = 392,369.15 × 74,588.50
  4. Step 4: Simplify right side
    261,577x = 29,266,226,344.78
  5. Step 5: Solve for x
    x = 29,266,226,344.78/261,577
  6. Step 6: Final answer
    x = 111,883.79

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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.