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Finding the Fourth Proportional to 347.67, 521.51 and 87.66

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Solution

The fourth proportional to 347.67, 521.51 and 87.66 is: 131.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.67 : 521.51 = 87.66 : x
  2. Step 2: Convert to fraction form
    347.67/521.51 = 87.66/x
  3. Step 3: Cross multiply
    347.67x = 521.51 × 87.66
  4. Step 4: Simplify right side
    347.67x = 45,715.13
  5. Step 5: Solve for x
    x = 45,715.13/347.67
  6. Step 6: Final answer
    x = 131.49

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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.