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Finding the Fourth Proportional to 347.68, 519.98 and 309.43

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Solution

The fourth proportional to 347.68, 519.98 and 309.43 is: 462.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.68 : 519.98 = 309.43 : x
  2. Step 2: Convert to fraction form
    347.68/519.98 = 309.43/x
  3. Step 3: Cross multiply
    347.68x = 519.98 × 309.43
  4. Step 4: Simplify right side
    347.68x = 160,897.41
  5. Step 5: Solve for x
    x = 160,897.41/347.68
  6. Step 6: Final answer
    x = 462.77

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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.