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Finding the Fourth Proportional to 391,185.36, 586,748.88 and 124,974

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Solution

The fourth proportional to 391,185.36, 586,748.88 and 124,974 is: 187,451.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,185.36 : 586,748.88 = 124,974 : x
  2. Step 2: Convert to fraction form
    391,185.36/586,748.88 = 124,974/x
  3. Step 3: Cross multiply
    391,185.36x = 586,748.88 × 124,974
  4. Step 4: Simplify right side
    391,185.36x = 73,328,354,529.12
  5. Step 5: Solve for x
    x = 73,328,354,529.12/391,185.36
  6. Step 6: Final answer
    x = 187,451.68

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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.