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Finding the Fourth Proportional to 720,537.76, 994,393.56 and 398,240.88

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Solution

The fourth proportional to 720,537.76, 994,393.56 and 398,240.88 is: 549,600.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,537.76 : 994,393.56 = 398,240.88 : x
  2. Step 2: Convert to fraction form
    720,537.76/994,393.56 = 398,240.88/x
  3. Step 3: Cross multiply
    720,537.76x = 994,393.56 × 398,240.88
  4. Step 4: Simplify right side
    720,537.76x = 396,008,166,400.73
  5. Step 5: Solve for x
    x = 396,008,166,400.73/720,537.76
  6. Step 6: Final answer
    x = 549,600.85

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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.