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Finding the Fourth Proportional to 391,385.18, 540,102.42 and 230,250.61

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Solution

The fourth proportional to 391,385.18, 540,102.42 and 230,250.61 is: 317,740.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,385.18 : 540,102.42 = 230,250.61 : x
  2. Step 2: Convert to fraction form
    391,385.18/540,102.42 = 230,250.61/x
  3. Step 3: Cross multiply
    391,385.18x = 540,102.42 × 230,250.61
  4. Step 4: Simplify right side
    391,385.18x = 124,358,911,667.48
  5. Step 5: Solve for x
    x = 124,358,911,667.48/391,385.18
  6. Step 6: Final answer
    x = 317,740.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.