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Finding the Fourth Proportional to 391,318.45, 586,900.69 and 125,007.19

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Solution

The fourth proportional to 391,318.45, 586,900.69 and 125,007.19 is: 187,486.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,318.45 : 586,900.69 = 125,007.19 : x
  2. Step 2: Convert to fraction form
    391,318.45/586,900.69 = 125,007.19/x
  3. Step 3: Cross multiply
    391,318.45x = 586,900.69 × 125,007.19
  4. Step 4: Simplify right side
    391,318.45x = 73,366,806,065.96
  5. Step 5: Solve for x
    x = 73,366,806,065.96/391,318.45
  6. Step 6: Final answer
    x = 187,486.19

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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.