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Finding the Fourth Proportional to 687,551.22, 948,805.92 and 381,609.72

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Solution

The fourth proportional to 687,551.22, 948,805.92 and 381,609.72 is: 526,613.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,551.22 : 948,805.92 = 381,609.72 : x
  2. Step 2: Convert to fraction form
    687,551.22/948,805.92 = 381,609.72/x
  3. Step 3: Cross multiply
    687,551.22x = 948,805.92 × 381,609.72
  4. Step 4: Simplify right side
    687,551.22x = 362,073,561,465.54
  5. Step 5: Solve for x
    x = 362,073,561,465.54/687,551.22
  6. Step 6: Final answer
    x = 526,613.22

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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.