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Finding the Fourth Proportional to 373.92, 514.86 and 318.53

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Solution

The fourth proportional to 373.92, 514.86 and 318.53 is: 438.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.92 : 514.86 = 318.53 : x
  2. Step 2: Convert to fraction form
    373.92/514.86 = 318.53/x
  3. Step 3: Cross multiply
    373.92x = 514.86 × 318.53
  4. Step 4: Simplify right side
    373.92x = 163,998.45
  5. Step 5: Solve for x
    x = 163,998.45/373.92
  6. Step 6: Final answer
    x = 438.60

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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.