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Finding the Fourth Proportional to 720,617.64, 994,452.59 and 398,327.65

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Solution

The fourth proportional to 720,617.64, 994,452.59 and 398,327.65 is: 549,692.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,617.64 : 994,452.59 = 398,327.65 : x
  2. Step 2: Convert to fraction form
    720,617.64/994,452.59 = 398,327.65/x
  3. Step 3: Cross multiply
    720,617.64x = 994,452.59 × 398,327.65
  4. Step 4: Simplify right side
    720,617.64x = 396,117,964,517.70
  5. Step 5: Solve for x
    x = 396,117,964,517.70/720,617.64
  6. Step 6: Final answer
    x = 549,692.30

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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.