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Finding the Fourth Proportional to 457.65, 631.57 and 261.15

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Solution

The fourth proportional to 457.65, 631.57 and 261.15 is: 360.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.65 : 631.57 = 261.15 : x
  2. Step 2: Convert to fraction form
    457.65/631.57 = 261.15/x
  3. Step 3: Cross multiply
    457.65x = 631.57 × 261.15
  4. Step 4: Simplify right side
    457.65x = 164,934.51
  5. Step 5: Solve for x
    x = 164,934.51/457.65
  6. Step 6: Final answer
    x = 360.39

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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.