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Finding the Fourth Proportional to 391,405.50, 587,108.25 and 95,917.50

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Solution

The fourth proportional to 391,405.50, 587,108.25 and 95,917.50 is: 143,876.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,405.50 : 587,108.25 = 95,917.50 : x
  2. Step 2: Convert to fraction form
    391,405.50/587,108.25 = 95,917.50/x
  3. Step 3: Cross multiply
    391,405.50x = 587,108.25 × 95,917.50
  4. Step 4: Simplify right side
    391,405.50x = 56,313,955,569.38
  5. Step 5: Solve for x
    x = 56,313,955,569.38/391,405.50
  6. Step 6: Final answer
    x = 143,876.25

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1.5x scale

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.