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Finding the Fourth Proportional to 347.96, 521.93 and 142.47

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Solution

The fourth proportional to 347.96, 521.93 and 142.47 is: 213.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.96 : 521.93 = 142.47 : x
  2. Step 2: Convert to fraction form
    347.96/521.93 = 142.47/x
  3. Step 3: Cross multiply
    347.96x = 521.93 × 142.47
  4. Step 4: Simplify right side
    347.96x = 74,359.37
  5. Step 5: Solve for x
    x = 74,359.37/347.96
  6. Step 6: Final answer
    x = 213.70

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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.