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Finding the Fourth Proportional to 760.56, 1,142.97 and 742.14

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Solution

The fourth proportional to 760.56, 1,142.97 and 742.14 is: 1,115.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.56 : 1,142.97 = 742.14 : x
  2. Step 2: Convert to fraction form
    760.56/1,142.97 = 742.14/x
  3. Step 3: Cross multiply
    760.56x = 1,142.97 × 742.14
  4. Step 4: Simplify right side
    760.56x = 848,243.76
  5. Step 5: Solve for x
    x = 848,243.76/760.56
  6. Step 6: Final answer
    x = 1,115.29

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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.