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Finding the Fourth Proportional to 1,168.48, 1,612.36 and 742.96

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Solution

The fourth proportional to 1,168.48, 1,612.36 and 742.96 is: 1,025.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.48 : 1,612.36 = 742.96 : x
  2. Step 2: Convert to fraction form
    1,168.48/1,612.36 = 742.96/x
  3. Step 3: Cross multiply
    1,168.48x = 1,612.36 × 742.96
  4. Step 4: Simplify right side
    1,168.48x = 1,197,918.99
  5. Step 5: Solve for x
    x = 1,197,918.99/1,168.48
  6. Step 6: Final answer
    x = 1,025.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.