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Finding the Fourth Proportional to 687,857.88, 1,026,201.17 and 650,655.96

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Solution

The fourth proportional to 687,857.88, 1,026,201.17 and 650,655.96 is: 970,700.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,857.88 : 1,026,201.17 = 650,655.96 : x
  2. Step 2: Convert to fraction form
    687,857.88/1,026,201.17 = 650,655.96/x
  3. Step 3: Cross multiply
    687,857.88x = 1,026,201.17 × 650,655.96
  4. Step 4: Simplify right side
    687,857.88x = 667,703,907,419.47
  5. Step 5: Solve for x
    x = 667,703,907,419.47/687,857.88
  6. Step 6: Final answer
    x = 970,700.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.