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Finding the Fourth Proportional to 261,601, 392,405.22 and 74,612.56

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Solution

The fourth proportional to 261,601, 392,405.22 and 74,612.56 is: 111,919.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,601 : 392,405.22 = 74,612.56 : x
  2. Step 2: Convert to fraction form
    261,601/392,405.22 = 74,612.56/x
  3. Step 3: Cross multiply
    261,601x = 392,405.22 × 74,612.56
  4. Step 4: Simplify right side
    261,601x = 29,278,358,021.56
  5. Step 5: Solve for x
    x = 29,278,358,021.56/261,601
  6. Step 6: Final answer
    x = 111,919.90

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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.