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Finding the Fourth Proportional to 457.45, 631.40 and 261.02

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Solution

The fourth proportional to 457.45, 631.40 and 261.02 is: 360.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.45 : 631.40 = 261.02 : x
  2. Step 2: Convert to fraction form
    457.45/631.40 = 261.02/x
  3. Step 3: Cross multiply
    457.45x = 631.40 × 261.02
  4. Step 4: Simplify right side
    457.45x = 164,808.30
  5. Step 5: Solve for x
    x = 164,808.30/457.45
  6. Step 6: Final answer
    x = 360.28

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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.