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Finding the Fourth Proportional to 720,959.74, 994,921.89 and 406,606.64

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Solution

The fourth proportional to 720,959.74, 994,921.89 and 406,606.64 is: 561,115.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,959.74 : 994,921.89 = 406,606.64 : x
  2. Step 2: Convert to fraction form
    720,959.74/994,921.89 = 406,606.64/x
  3. Step 3: Cross multiply
    720,959.74x = 994,921.89 × 406,606.64
  4. Step 4: Simplify right side
    720,959.74x = 404,541,840,255.97
  5. Step 5: Solve for x
    x = 404,541,840,255.97/720,959.74
  6. Step 6: Final answer
    x = 561,115.72

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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.