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Finding the Fourth Proportional to 1,225,084, 1,690,615.92 and 688,540

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Solution

The fourth proportional to 1,225,084, 1,690,615.92 and 688,540 is: 950,185.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225,084 : 1,690,615.92 = 688,540 : x
  2. Step 2: Convert to fraction form
    1,225,084/1,690,615.92 = 688,540/x
  3. Step 3: Cross multiply
    1,225,084x = 1,690,615.92 × 688,540
  4. Step 4: Simplify right side
    1,225,084x = 1,164,056,685,556.80
  5. Step 5: Solve for x
    x = 1,164,056,685,556.80/1,225,084
  6. Step 6: Final answer
    x = 950,185.20

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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.