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Finding the Fourth Proportional to 391,571.15, 587,430.23 and 125,260.16

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Solution

The fourth proportional to 391,571.15, 587,430.23 and 125,260.16 is: 187,913.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,571.15 : 587,430.23 = 125,260.16 : x
  2. Step 2: Convert to fraction form
    391,571.15/587,430.23 = 125,260.16/x
  3. Step 3: Cross multiply
    391,571.15x = 587,430.23 × 125,260.16
  4. Step 4: Simplify right side
    391,571.15x = 73,581,601,035.18
  5. Step 5: Solve for x
    x = 73,581,601,035.18/391,571.15
  6. Step 6: Final answer
    x = 187,913.75

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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.