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Finding the Fourth Proportional to 373.50, 515.92 and 311.53

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Solution

The fourth proportional to 373.50, 515.92 and 311.53 is: 430.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.50 : 515.92 = 311.53 : x
  2. Step 2: Convert to fraction form
    373.50/515.92 = 311.53/x
  3. Step 3: Cross multiply
    373.50x = 515.92 × 311.53
  4. Step 4: Simplify right side
    373.50x = 160,723.00
  5. Step 5: Solve for x
    x = 160,723.00/373.50
  6. Step 6: Final answer
    x = 430.32

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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.