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Finding the Fourth Proportional to 391,155.68, 539,879.07 and 238,244.29

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Solution

The fourth proportional to 391,155.68, 539,879.07 and 238,244.29 is: 328,828.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,155.68 : 539,879.07 = 238,244.29 : x
  2. Step 2: Convert to fraction form
    391,155.68/539,879.07 = 238,244.29/x
  3. Step 3: Cross multiply
    391,155.68x = 539,879.07 × 238,244.29
  4. Step 4: Simplify right side
    391,155.68x = 128,623,105,261.73
  5. Step 5: Solve for x
    x = 128,623,105,261.73/391,155.68
  6. Step 6: Final answer
    x = 328,828.42

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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.