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Finding the Fourth Proportional to 347.54, 520.71 and 266.14

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Solution

The fourth proportional to 347.54, 520.71 and 266.14 is: 398.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.54 : 520.71 = 266.14 : x
  2. Step 2: Convert to fraction form
    347.54/520.71 = 266.14/x
  3. Step 3: Cross multiply
    347.54x = 520.71 × 266.14
  4. Step 4: Simplify right side
    347.54x = 138,581.76
  5. Step 5: Solve for x
    x = 138,581.76/347.54
  6. Step 6: Final answer
    x = 398.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.