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Finding the Fourth Proportional to 347.24, 520.68 and 215.60

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Solution

The fourth proportional to 347.24, 520.68 and 215.60 is: 323.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.24 : 520.68 = 215.60 : x
  2. Step 2: Convert to fraction form
    347.24/520.68 = 215.60/x
  3. Step 3: Cross multiply
    347.24x = 520.68 × 215.60
  4. Step 4: Simplify right side
    347.24x = 112,258.61
  5. Step 5: Solve for x
    x = 112,258.61/347.24
  6. Step 6: Final answer
    x = 323.29

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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.