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Finding the Fourth Proportional to 720,376.08, 994,092.24 and 398,079.52

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Solution

The fourth proportional to 720,376.08, 994,092.24 and 398,079.52 is: 549,334.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,376.08 : 994,092.24 = 398,079.52 : x
  2. Step 2: Convert to fraction form
    720,376.08/994,092.24 = 398,079.52/x
  3. Step 3: Cross multiply
    720,376.08x = 994,092.24 × 398,079.52
  4. Step 4: Simplify right side
    720,376.08x = 395,727,761,734.93
  5. Step 5: Solve for x
    x = 395,727,761,734.93/720,376.08
  6. Step 6: Final answer
    x = 549,334.96

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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.