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Finding the Fourth Proportional to 391,396.31, 586,909.42 and 151,622.51

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Solution

The fourth proportional to 391,396.31, 586,909.42 and 151,622.51 is: 227,362.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,396.31 : 586,909.42 = 151,622.51 : x
  2. Step 2: Convert to fraction form
    391,396.31/586,909.42 = 151,622.51/x
  3. Step 3: Cross multiply
    391,396.31x = 586,909.42 × 151,622.51
  4. Step 4: Simplify right side
    391,396.31x = 88,988,679,403.04
  5. Step 5: Solve for x
    x = 88,988,679,403.04/391,396.31
  6. Step 6: Final answer
    x = 227,362.08

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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.