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Finding the Fourth Proportional to 1,222,876, 1,687,568.88 and 686,332

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Solution

The fourth proportional to 1,222,876, 1,687,568.88 and 686,332 is: 947,138.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,876 : 1,687,568.88 = 686,332 : x
  2. Step 2: Convert to fraction form
    1,222,876/1,687,568.88 = 686,332/x
  3. Step 3: Cross multiply
    1,222,876x = 1,687,568.88 × 686,332
  4. Step 4: Simplify right side
    1,222,876x = 1,158,232,524,548.16
  5. Step 5: Solve for x
    x = 1,158,232,524,548.16/1,222,876
  6. Step 6: Final answer
    x = 947,138.16

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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.