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Finding the Fourth Proportional to 373.02, 515.19 and 306.80

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Solution

The fourth proportional to 373.02, 515.19 and 306.80 is: 423.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.02 : 515.19 = 306.80 : x
  2. Step 2: Convert to fraction form
    373.02/515.19 = 306.80/x
  3. Step 3: Cross multiply
    373.02x = 515.19 × 306.80
  4. Step 4: Simplify right side
    373.02x = 158,060.29
  5. Step 5: Solve for x
    x = 158,060.29/373.02
  6. Step 6: Final answer
    x = 423.73

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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.