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Finding the Fourth Proportional to 391,394.31, 586,906.42 and 151,620.51

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Solution

The fourth proportional to 391,394.31, 586,906.42 and 151,620.51 is: 227,359.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,394.31 : 586,906.42 = 151,620.51 : x
  2. Step 2: Convert to fraction form
    391,394.31/586,906.42 = 151,620.51/x
  3. Step 3: Cross multiply
    391,394.31x = 586,906.42 × 151,620.51
  4. Step 4: Simplify right side
    391,394.31x = 88,987,051,810.89
  5. Step 5: Solve for x
    x = 88,987,051,810.89/391,394.31
  6. Step 6: Final answer
    x = 227,359.08

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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.