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Finding the Fourth Proportional to 742.07, 1,113.21 and 248.31

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Solution

The fourth proportional to 742.07, 1,113.21 and 248.31 is: 372.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.07 : 1,113.21 = 248.31 : x
  2. Step 2: Convert to fraction form
    742.07/1,113.21 = 248.31/x
  3. Step 3: Cross multiply
    742.07x = 1,113.21 × 248.31
  4. Step 4: Simplify right side
    742.07x = 276,419.93
  5. Step 5: Solve for x
    x = 276,419.93/742.07
  6. Step 6: Final answer
    x = 372.50

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.