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Finding the Fourth Proportional to 347.46, 521.32 and 210.60

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Solution

The fourth proportional to 347.46, 521.32 and 210.60 is: 315.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.46 : 521.32 = 210.60 : x
  2. Step 2: Convert to fraction form
    347.46/521.32 = 210.60/x
  3. Step 3: Cross multiply
    347.46x = 521.32 × 210.60
  4. Step 4: Simplify right side
    347.46x = 109,789.99
  5. Step 5: Solve for x
    x = 109,789.99/347.46
  6. Step 6: Final answer
    x = 315.98

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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.