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Finding the Fourth Proportional to 373.69, 515.40 and 242.74

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Solution

The fourth proportional to 373.69, 515.40 and 242.74 is: 334.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.69 : 515.40 = 242.74 : x
  2. Step 2: Convert to fraction form
    373.69/515.40 = 242.74/x
  3. Step 3: Cross multiply
    373.69x = 515.40 × 242.74
  4. Step 4: Simplify right side
    373.69x = 125,108.20
  5. Step 5: Solve for x
    x = 125,108.20/373.69
  6. Step 6: Final answer
    x = 334.79

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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.