Home / 1,411.24-2,116.86-762.16

Finding the Fourth Proportional to 1,411.24, 2,116.86 and 762.16

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Solution

The fourth proportional to 1,411.24, 2,116.86 and 762.16 is: 1,143.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.24 : 2,116.86 = 762.16 : x
  2. Step 2: Convert to fraction form
    1,411.24/2,116.86 = 762.16/x
  3. Step 3: Cross multiply
    1,411.24x = 2,116.86 × 762.16
  4. Step 4: Simplify right side
    1,411.24x = 1,613,386.02
  5. Step 5: Solve for x
    x = 1,613,386.02/1,411.24
  6. Step 6: Final answer
    x = 1,143.24

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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.