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Finding the Fourth Proportional to 2,689.28, 4,033.68 and 741.32

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Solution

The fourth proportional to 2,689.28, 4,033.68 and 741.32 is: 1,111.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.28 : 4,033.68 = 741.32 : x
  2. Step 2: Convert to fraction form
    2,689.28/4,033.68 = 741.32/x
  3. Step 3: Cross multiply
    2,689.28x = 4,033.68 × 741.32
  4. Step 4: Simplify right side
    2,689.28x = 2,990,247.66
  5. Step 5: Solve for x
    x = 2,990,247.66/2,689.28
  6. Step 6: Final answer
    x = 1,111.91

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1.5x scale

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.