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Finding the Fourth Proportional to 743.12, 1,114.68 and 230.12

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Solution

The fourth proportional to 743.12, 1,114.68 and 230.12 is: 345.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.12 : 1,114.68 = 230.12 : x
  2. Step 2: Convert to fraction form
    743.12/1,114.68 = 230.12/x
  3. Step 3: Cross multiply
    743.12x = 1,114.68 × 230.12
  4. Step 4: Simplify right side
    743.12x = 256,510.16
  5. Step 5: Solve for x
    x = 256,510.16/743.12
  6. Step 6: Final answer
    x = 345.18

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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.