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Finding the Fourth Proportional to 2,688.85, 4,033.28 and 741.05

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Solution

The fourth proportional to 2,688.85, 4,033.28 and 741.05 is: 1,111.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.85 : 4,033.28 = 741.05 : x
  2. Step 2: Convert to fraction form
    2,688.85/4,033.28 = 741.05/x
  3. Step 3: Cross multiply
    2,688.85x = 4,033.28 × 741.05
  4. Step 4: Simplify right side
    2,688.85x = 2,988,868.52
  5. Step 5: Solve for x
    x = 2,988,868.52/2,688.85
  6. Step 6: Final answer
    x = 1,111.58

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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.