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Finding the Fourth Proportional to 391,146.30, 548,785.80 and 391,146.30

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Solution

The fourth proportional to 391,146.30, 548,785.80 and 391,146.30 is: 548,785.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,146.30 : 548,785.80 = 391,146.30 : x
  2. Step 2: Convert to fraction form
    391,146.30/548,785.80 = 391,146.30/x
  3. Step 3: Cross multiply
    391,146.30x = 548,785.80 × 391,146.30
  4. Step 4: Simplify right side
    391,146.30x = 214,655,535,162.54
  5. Step 5: Solve for x
    x = 214,655,535,162.54/391,146.30
  6. Step 6: Final answer
    x = 548,785.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.