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Finding the Fourth Proportional to 473.72, 710.78 and 230.20

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Solution

The fourth proportional to 473.72, 710.78 and 230.20 is: 345.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.72 : 710.78 = 230.20 : x
  2. Step 2: Convert to fraction form
    473.72/710.78 = 230.20/x
  3. Step 3: Cross multiply
    473.72x = 710.78 × 230.20
  4. Step 4: Simplify right side
    473.72x = 163,621.56
  5. Step 5: Solve for x
    x = 163,621.56/473.72
  6. Step 6: Final answer
    x = 345.40

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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.