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Finding the Fourth Proportional to 2,689.60, 4,033.93 and 741.35

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Solution

The fourth proportional to 2,689.60, 4,033.93 and 741.35 is: 1,111.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.60 : 4,033.93 = 741.35 : x
  2. Step 2: Convert to fraction form
    2,689.60/4,033.93 = 741.35/x
  3. Step 3: Cross multiply
    2,689.60x = 4,033.93 × 741.35
  4. Step 4: Simplify right side
    2,689.60x = 2,990,554.01
  5. Step 5: Solve for x
    x = 2,990,554.01/2,689.60
  6. Step 6: Final answer
    x = 1,111.90

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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.