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Finding the Fourth Proportional to 375,691.56, 518,532.60 and 345,428.74

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Solution

The fourth proportional to 375,691.56, 518,532.60 and 345,428.74 is: 476,763.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,691.56 : 518,532.60 = 345,428.74 : x
  2. Step 2: Convert to fraction form
    375,691.56/518,532.60 = 345,428.74/x
  3. Step 3: Cross multiply
    375,691.56x = 518,532.60 × 345,428.74
  4. Step 4: Simplify right side
    375,691.56x = 179,116,062,666.92
  5. Step 5: Solve for x
    x = 179,116,062,666.92/375,691.56
  6. Step 6: Final answer
    x = 476,763.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.