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Finding the Fourth Proportional to 457.45, 685.76 and 223.14

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Solution

The fourth proportional to 457.45, 685.76 and 223.14 is: 334.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.45 : 685.76 = 223.14 : x
  2. Step 2: Convert to fraction form
    457.45/685.76 = 223.14/x
  3. Step 3: Cross multiply
    457.45x = 685.76 × 223.14
  4. Step 4: Simplify right side
    457.45x = 153,018.71
  5. Step 5: Solve for x
    x = 153,018.71/457.45
  6. Step 6: Final answer
    x = 334.51

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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.