Home / 687,531.20-948,778.77-381,589.64

Finding the Fourth Proportional to 687,531.20, 948,778.77 and 381,589.64

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Solution

The fourth proportional to 687,531.20, 948,778.77 and 381,589.64 is: 526,585.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,531.20 : 948,778.77 = 381,589.64 : x
  2. Step 2: Convert to fraction form
    687,531.20/948,778.77 = 381,589.64/x
  3. Step 3: Cross multiply
    687,531.20x = 948,778.77 × 381,589.64
  4. Step 4: Simplify right side
    687,531.20x = 362,044,144,540.05
  5. Step 5: Solve for x
    x = 362,044,144,540.05/687,531.20
  6. Step 6: Final answer
    x = 526,585.77

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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.