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Finding the Fourth Proportional to 391,092.48, 539,715.28 and 255,213.36

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Solution

The fourth proportional to 391,092.48, 539,715.28 and 255,213.36 is: 352,199.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,092.48 : 539,715.28 = 255,213.36 : x
  2. Step 2: Convert to fraction form
    391,092.48/539,715.28 = 255,213.36/x
  3. Step 3: Cross multiply
    391,092.48x = 539,715.28 × 255,213.36
  4. Step 4: Simplify right side
    391,092.48x = 137,742,550,052.14
  5. Step 5: Solve for x
    x = 137,742,550,052.14/391,092.48
  6. Step 6: Final answer
    x = 352,199.43

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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.