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Finding the Fourth Proportional to 391,397.06, 539,600.72 and 255,161.54

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Solution

The fourth proportional to 391,397.06, 539,600.72 and 255,161.54 is: 351,779.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,397.06 : 539,600.72 = 255,161.54 : x
  2. Step 2: Convert to fraction form
    391,397.06/539,600.72 = 255,161.54/x
  3. Step 3: Cross multiply
    391,397.06x = 539,600.72 × 255,161.54
  4. Step 4: Simplify right side
    391,397.06x = 137,685,350,700.31
  5. Step 5: Solve for x
    x = 137,685,350,700.31/391,397.06
  6. Step 6: Final answer
    x = 351,779.22

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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.