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Finding the Fourth Proportional to 347.68, 521.54 and 211.60

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Solution

The fourth proportional to 347.68, 521.54 and 211.60 is: 317.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.68 : 521.54 = 211.60 : x
  2. Step 2: Convert to fraction form
    347.68/521.54 = 211.60/x
  3. Step 3: Cross multiply
    347.68x = 521.54 × 211.60
  4. Step 4: Simplify right side
    347.68x = 110,357.86
  5. Step 5: Solve for x
    x = 110,357.86/347.68
  6. Step 6: Final answer
    x = 317.41

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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.