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Finding the Fourth Proportional to 347.46, 521.18 and 309.30

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Solution

The fourth proportional to 347.46, 521.18 and 309.30 is: 463.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.46 : 521.18 = 309.30 : x
  2. Step 2: Convert to fraction form
    347.46/521.18 = 309.30/x
  3. Step 3: Cross multiply
    347.46x = 521.18 × 309.30
  4. Step 4: Simplify right side
    347.46x = 161,200.97
  5. Step 5: Solve for x
    x = 161,200.97/347.46
  6. Step 6: Final answer
    x = 463.94

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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.