Home / 1,361.29-2,041.33-387.17

Finding the Fourth Proportional to 1,361.29, 2,041.33 and 387.17

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Solution

The fourth proportional to 1,361.29, 2,041.33 and 387.17 is: 580.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.29 : 2,041.33 = 387.17 : x
  2. Step 2: Convert to fraction form
    1,361.29/2,041.33 = 387.17/x
  3. Step 3: Cross multiply
    1,361.29x = 2,041.33 × 387.17
  4. Step 4: Simplify right side
    1,361.29x = 790,341.74
  5. Step 5: Solve for x
    x = 790,341.74/1,361.29
  6. Step 6: Final answer
    x = 580.58

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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.