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Finding the Fourth Proportional to 2,689.78, 4,034.67 and 741.99

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Solution

The fourth proportional to 2,689.78, 4,034.67 and 741.99 is: 1,112.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.78 : 4,034.67 = 741.99 : x
  2. Step 2: Convert to fraction form
    2,689.78/4,034.67 = 741.99/x
  3. Step 3: Cross multiply
    2,689.78x = 4,034.67 × 741.99
  4. Step 4: Simplify right side
    2,689.78x = 2,993,672.45
  5. Step 5: Solve for x
    x = 2,993,672.45/2,689.78
  6. Step 6: Final answer
    x = 1,112.98

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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.