Home / 987,121.40-1,481,274.48-426,155.36

Finding the Fourth Proportional to 987,121.40, 1,481,274.48 and 426,155.36

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Solution

The fourth proportional to 987,121.40, 1,481,274.48 and 426,155.36 is: 639,488.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,121.40 : 1,481,274.48 = 426,155.36 : x
  2. Step 2: Convert to fraction form
    987,121.40/1,481,274.48 = 426,155.36/x
  3. Step 3: Cross multiply
    987,121.40x = 1,481,274.48 × 426,155.36
  4. Step 4: Simplify right side
    987,121.40x = 631,253,059,283.21
  5. Step 5: Solve for x
    x = 631,253,059,283.21/987,121.40
  6. Step 6: Final answer
    x = 639,488.78

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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.