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Finding the Fourth Proportional to 702,178.72, 1,053,858.80 and 657,891.92

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Solution

The fourth proportional to 702,178.72, 1,053,858.80 and 657,891.92 is: 987,391.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,178.72 : 1,053,858.80 = 657,891.92 : x
  2. Step 2: Convert to fraction form
    702,178.72/1,053,858.80 = 657,891.92/x
  3. Step 3: Cross multiply
    702,178.72x = 1,053,858.80 × 657,891.92
  4. Step 4: Simplify right side
    702,178.72x = 693,325,189,340.90
  5. Step 5: Solve for x
    x = 693,325,189,340.90/702,178.72
  6. Step 6: Final answer
    x = 987,391.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.