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Finding the Fourth Proportional to 391,767.74, 587,651.56 and 258,616.80

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Solution

The fourth proportional to 391,767.74, 587,651.56 and 258,616.80 is: 387,925.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,767.74 : 587,651.56 = 258,616.80 : x
  2. Step 2: Convert to fraction form
    391,767.74/587,651.56 = 258,616.80/x
  3. Step 3: Cross multiply
    391,767.74x = 587,651.56 × 258,616.80
  4. Step 4: Simplify right side
    391,767.74x = 151,976,565,315.67
  5. Step 5: Solve for x
    x = 151,976,565,315.67/391,767.74
  6. Step 6: Final answer
    x = 387,925.17

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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.