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Finding the Fourth Proportional to 391,403.50, 587,105.25 and 95,915.50

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Solution

The fourth proportional to 391,403.50, 587,105.25 and 95,915.50 is: 143,873.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,403.50 : 587,105.25 = 95,915.50 : x
  2. Step 2: Convert to fraction form
    391,403.50/587,105.25 = 95,915.50/x
  3. Step 3: Cross multiply
    391,403.50x = 587,105.25 × 95,915.50
  4. Step 4: Simplify right side
    391,403.50x = 56,312,493,606.38
  5. Step 5: Solve for x
    x = 56,312,493,606.38/391,403.50
  6. Step 6: Final answer
    x = 143,873.25

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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.