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Finding the Fourth Proportional to 347.53, 520.87 and 266.71

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Solution

The fourth proportional to 347.53, 520.87 and 266.71 is: 399.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.53 : 520.87 = 266.71 : x
  2. Step 2: Convert to fraction form
    347.53/520.87 = 266.71/x
  3. Step 3: Cross multiply
    347.53x = 520.87 × 266.71
  4. Step 4: Simplify right side
    347.53x = 138,921.24
  5. Step 5: Solve for x
    x = 138,921.24/347.53
  6. Step 6: Final answer
    x = 399.74

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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.