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Finding the Fourth Proportional to 391,505.22, 540,251.60 and 230,329.15

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Solution

The fourth proportional to 391,505.22, 540,251.60 and 230,329.15 is: 317,839.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,505.22 : 540,251.60 = 230,329.15 : x
  2. Step 2: Convert to fraction form
    391,505.22/540,251.60 = 230,329.15/x
  3. Step 3: Cross multiply
    391,505.22x = 540,251.60 × 230,329.15
  4. Step 4: Simplify right side
    391,505.22x = 124,435,691,814.14
  5. Step 5: Solve for x
    x = 124,435,691,814.14/391,505.22
  6. Step 6: Final answer
    x = 317,839.16

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1.5x scale

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.