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Finding the Fourth Proportional to 351,268.71, 526,689.50 and 137,780.79

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Solution

The fourth proportional to 351,268.71, 526,689.50 and 137,780.79 is: 206,587.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,268.71 : 526,689.50 = 137,780.79 : x
  2. Step 2: Convert to fraction form
    351,268.71/526,689.50 = 137,780.79/x
  3. Step 3: Cross multiply
    351,268.71x = 526,689.50 × 137,780.79
  4. Step 4: Simplify right side
    351,268.71x = 72,567,694,705.80
  5. Step 5: Solve for x
    x = 72,567,694,705.80/351,268.71
  6. Step 6: Final answer
    x = 206,587.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.