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Finding the Fourth Proportional to 2,592.28, 3,887.63 and 742.90

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Solution

The fourth proportional to 2,592.28, 3,887.63 and 742.90 is: 1,114.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,592.28 : 3,887.63 = 742.90 : x
  2. Step 2: Convert to fraction form
    2,592.28/3,887.63 = 742.90/x
  3. Step 3: Cross multiply
    2,592.28x = 3,887.63 × 742.90
  4. Step 4: Simplify right side
    2,592.28x = 2,888,122.40
  5. Step 5: Solve for x
    x = 2,888,122.40/2,592.28
  6. Step 6: Final answer
    x = 1,114.12

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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.