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Finding the Fourth Proportional to 457.26, 631.07 and 270.78

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Solution

The fourth proportional to 457.26, 631.07 and 270.78 is: 373.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.26 : 631.07 = 270.78 : x
  2. Step 2: Convert to fraction form
    457.26/631.07 = 270.78/x
  3. Step 3: Cross multiply
    457.26x = 631.07 × 270.78
  4. Step 4: Simplify right side
    457.26x = 170,879.78
  5. Step 5: Solve for x
    x = 170,879.78/457.26
  6. Step 6: Final answer
    x = 373.70

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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.