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Finding the Fourth Proportional to 456.80, 630.38 and 270.30

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Solution

The fourth proportional to 456.80, 630.38 and 270.30 is: 373.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.80 : 630.38 = 270.30 : x
  2. Step 2: Convert to fraction form
    456.80/630.38 = 270.30/x
  3. Step 3: Cross multiply
    456.80x = 630.38 × 270.30
  4. Step 4: Simplify right side
    456.80x = 170,391.71
  5. Step 5: Solve for x
    x = 170,391.71/456.80
  6. Step 6: Final answer
    x = 373.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.