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Finding the Fourth Proportional to 720,908.16, 994,925.84 and 398,642.56

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Solution

The fourth proportional to 720,908.16, 994,925.84 and 398,642.56 is: 550,166.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,908.16 : 994,925.84 = 398,642.56 : x
  2. Step 2: Convert to fraction form
    720,908.16/994,925.84 = 398,642.56/x
  3. Step 3: Cross multiply
    720,908.16x = 994,925.84 × 398,642.56
  4. Step 4: Simplify right side
    720,908.16x = 396,619,783,867.75
  5. Step 5: Solve for x
    x = 396,619,783,867.75/720,908.16
  6. Step 6: Final answer
    x = 550,166.87

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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.