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Finding the Fourth Proportional to 391,045.38, 539,549.58 and 238,081.82

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Solution

The fourth proportional to 391,045.38, 539,549.58 and 238,081.82 is: 328,496.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,045.38 : 539,549.58 = 238,081.82 : x
  2. Step 2: Convert to fraction form
    391,045.38/539,549.58 = 238,081.82/x
  3. Step 3: Cross multiply
    391,045.38x = 539,549.58 × 238,081.82
  4. Step 4: Simplify right side
    391,045.38x = 128,456,945,986.64
  5. Step 5: Solve for x
    x = 128,456,945,986.64/391,045.38
  6. Step 6: Final answer
    x = 328,496.26

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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.