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Finding the Fourth Proportional to 347.39, 479.89 and 242.76

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Solution

The fourth proportional to 347.39, 479.89 and 242.76 is: 335.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.39 : 479.89 = 242.76 : x
  2. Step 2: Convert to fraction form
    347.39/479.89 = 242.76/x
  3. Step 3: Cross multiply
    347.39x = 479.89 × 242.76
  4. Step 4: Simplify right side
    347.39x = 116,498.10
  5. Step 5: Solve for x
    x = 116,498.10/347.39
  6. Step 6: Final answer
    x = 335.35

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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.