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Finding the Fourth Proportional to 391,662.63, 587,387.70 and 107,284.77

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Solution

The fourth proportional to 391,662.63, 587,387.70 and 107,284.77 is: 160,898.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,662.63 : 587,387.70 = 107,284.77 : x
  2. Step 2: Convert to fraction form
    391,662.63/587,387.70 = 107,284.77/x
  3. Step 3: Cross multiply
    391,662.63x = 587,387.70 × 107,284.77
  4. Step 4: Simplify right side
    391,662.63x = 63,017,754,295.33
  5. Step 5: Solve for x
    x = 63,017,754,295.33/391,662.63
  6. Step 6: Final answer
    x = 160,898.05

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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.