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Finding the Fourth Proportional to 720,761.11, 994,607.58 and 398,451.98

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Solution

The fourth proportional to 720,761.11, 994,607.58 and 398,451.98 is: 549,840.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,761.11 : 994,607.58 = 398,451.98 : x
  2. Step 2: Convert to fraction form
    720,761.11/994,607.58 = 398,451.98/x
  3. Step 3: Cross multiply
    720,761.11x = 994,607.58 × 398,451.98
  4. Step 4: Simplify right side
    720,761.11x = 396,303,362,060.53
  5. Step 5: Solve for x
    x = 396,303,362,060.53/720,761.11
  6. Step 6: Final answer
    x = 549,840.10

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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.