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Finding the Fourth Proportional to 391,257.84, 586,666.44 and 124,955.76

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Solution

The fourth proportional to 391,257.84, 586,666.44 and 124,955.76 is: 187,363.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,257.84 : 586,666.44 = 124,955.76 : x
  2. Step 2: Convert to fraction form
    391,257.84/586,666.44 = 124,955.76/x
  3. Step 3: Cross multiply
    391,257.84x = 586,666.44 × 124,955.76
  4. Step 4: Simplify right side
    391,257.84x = 73,307,350,876.69
  5. Step 5: Solve for x
    x = 73,307,350,876.69/391,257.84
  6. Step 6: Final answer
    x = 187,363.28

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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.