Home / 1,090.31-1,634.85-387.17

Finding the Fourth Proportional to 1,090.31, 1,634.85 and 387.17

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Solution

The fourth proportional to 1,090.31, 1,634.85 and 387.17 is: 580.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.31 : 1,634.85 = 387.17 : x
  2. Step 2: Convert to fraction form
    1,090.31/1,634.85 = 387.17/x
  3. Step 3: Cross multiply
    1,090.31x = 1,634.85 × 387.17
  4. Step 4: Simplify right side
    1,090.31x = 632,956.70
  5. Step 5: Solve for x
    x = 632,956.70/1,090.31
  6. Step 6: Final answer
    x = 580.53

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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.