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Finding the Fourth Proportional to 720,785.32, 994,704.50 and 398,516.22

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Solution

The fourth proportional to 720,785.32, 994,704.50 and 398,516.22 is: 549,963.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,785.32 : 994,704.50 = 398,516.22 : x
  2. Step 2: Convert to fraction form
    720,785.32/994,704.50 = 398,516.22/x
  3. Step 3: Cross multiply
    720,785.32x = 994,704.50 × 398,516.22
  4. Step 4: Simplify right side
    720,785.32x = 396,405,878,353.28
  5. Step 5: Solve for x
    x = 396,405,878,353.28/720,785.32
  6. Step 6: Final answer
    x = 549,963.86

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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.