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Finding the Fourth Proportional to 720,926.61, 994,868.37 and 398,629.64

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Solution

The fourth proportional to 720,926.61, 994,868.37 and 398,629.64 is: 550,103.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,926.61 : 994,868.37 = 398,629.64 : x
  2. Step 2: Convert to fraction form
    720,926.61/994,868.37 = 398,629.64/x
  3. Step 3: Cross multiply
    720,926.61x = 994,868.37 × 398,629.64
  4. Step 4: Simplify right side
    720,926.61x = 396,584,015,206.15
  5. Step 5: Solve for x
    x = 396,584,015,206.15/720,926.61
  6. Step 6: Final answer
    x = 550,103.17

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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.