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Finding the Fourth Proportional to 720,847.59, 994,729.71 and 398,538.46

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Solution

The fourth proportional to 720,847.59, 994,729.71 and 398,538.46 is: 549,960.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,847.59 : 994,729.71 = 398,538.46 : x
  2. Step 2: Convert to fraction form
    720,847.59/994,729.71 = 398,538.46/x
  3. Step 3: Cross multiply
    720,847.59x = 994,729.71 × 398,538.46
  4. Step 4: Simplify right side
    720,847.59x = 396,438,046,739.65
  5. Step 5: Solve for x
    x = 396,438,046,739.65/720,847.59
  6. Step 6: Final answer
    x = 549,960.98

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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.