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Finding the Fourth Proportional to 741.42, 1,111.52 and 254.48

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Solution

The fourth proportional to 741.42, 1,111.52 and 254.48 is: 381.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.42 : 1,111.52 = 254.48 : x
  2. Step 2: Convert to fraction form
    741.42/1,111.52 = 254.48/x
  3. Step 3: Cross multiply
    741.42x = 1,111.52 × 254.48
  4. Step 4: Simplify right side
    741.42x = 282,854.69
  5. Step 5: Solve for x
    x = 282,854.69/741.42
  6. Step 6: Final answer
    x = 381.50

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Double scale
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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.