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Finding the Fourth Proportional to 714.20, 1,071.30 and 227.40

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Solution

The fourth proportional to 714.20, 1,071.30 and 227.40 is: 341.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.20 : 1,071.30 = 227.40 : x
  2. Step 2: Convert to fraction form
    714.20/1,071.30 = 227.40/x
  3. Step 3: Cross multiply
    714.20x = 1,071.30 × 227.40
  4. Step 4: Simplify right side
    714.20x = 243,613.62
  5. Step 5: Solve for x
    x = 243,613.62/714.20
  6. Step 6: Final answer
    x = 341.10

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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.