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Finding the Fourth Proportional to 720,793.66, 994,642.86 and 398,507.62

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Solution

The fourth proportional to 720,793.66, 994,642.86 and 398,507.62 is: 549,911.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,793.66 : 994,642.86 = 398,507.62 : x
  2. Step 2: Convert to fraction form
    720,793.66/994,642.86 = 398,507.62/x
  3. Step 3: Cross multiply
    720,793.66x = 994,642.86 × 398,507.62
  4. Step 4: Simplify right side
    720,793.66x = 396,372,758,888.59
  5. Step 5: Solve for x
    x = 396,372,758,888.59/720,793.66
  6. Step 6: Final answer
    x = 549,911.55

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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.