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Finding the Fourth Proportional to 1,222,866, 1,687,555.08 and 686,322

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Solution

The fourth proportional to 1,222,866, 1,687,555.08 and 686,322 is: 947,124.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,866 : 1,687,555.08 = 686,322 : x
  2. Step 2: Convert to fraction form
    1,222,866/1,687,555.08 = 686,322/x
  3. Step 3: Cross multiply
    1,222,866x = 1,687,555.08 × 686,322
  4. Step 4: Simplify right side
    1,222,866x = 1,158,206,177,615.76
  5. Step 5: Solve for x
    x = 1,158,206,177,615.76/1,222,866
  6. Step 6: Final answer
    x = 947,124.36

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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.