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Finding the Fourth Proportional to 743.41, 1,115.12 and 223.42

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Solution

The fourth proportional to 743.41, 1,115.12 and 223.42 is: 335.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.41 : 1,115.12 = 223.42 : x
  2. Step 2: Convert to fraction form
    743.41/1,115.12 = 223.42/x
  3. Step 3: Cross multiply
    743.41x = 1,115.12 × 223.42
  4. Step 4: Simplify right side
    743.41x = 249,136.76
  5. Step 5: Solve for x
    x = 249,136.76/743.41
  6. Step 6: Final answer
    x = 335.13

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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.