Home / 1,615.29-2,229.21-916.71

Finding the Fourth Proportional to 1,615.29, 2,229.21 and 916.71

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Solution

The fourth proportional to 1,615.29, 2,229.21 and 916.71 is: 1,265.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.29 : 2,229.21 = 916.71 : x
  2. Step 2: Convert to fraction form
    1,615.29/2,229.21 = 916.71/x
  3. Step 3: Cross multiply
    1,615.29x = 2,229.21 × 916.71
  4. Step 4: Simplify right side
    1,615.29x = 2,043,539.10
  5. Step 5: Solve for x
    x = 2,043,539.10/1,615.29
  6. Step 6: Final answer
    x = 1,265.12

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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.