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Finding the Fourth Proportional to 728,798.04, 1,005,745 and 402,122.34

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Solution

The fourth proportional to 728,798.04, 1,005,745 and 402,122.34 is: 554,930.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,798.04 : 1,005,745 = 402,122.34 : x
  2. Step 2: Convert to fraction form
    728,798.04/1,005,745 = 402,122.34/x
  3. Step 3: Cross multiply
    728,798.04x = 1,005,745 × 402,122.34
  4. Step 4: Simplify right side
    728,798.04x = 404,432,532,843.30
  5. Step 5: Solve for x
    x = 404,432,532,843.30/728,798.04
  6. Step 6: Final answer
    x = 554,930.87

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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.