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Finding the Fourth Proportional to 514.43, 709.40 and 339.83

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Solution

The fourth proportional to 514.43, 709.40 and 339.83 is: 468.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.43 : 709.40 = 339.83 : x
  2. Step 2: Convert to fraction form
    514.43/709.40 = 339.83/x
  3. Step 3: Cross multiply
    514.43x = 709.40 × 339.83
  4. Step 4: Simplify right side
    514.43x = 241,073.70
  5. Step 5: Solve for x
    x = 241,073.70/514.43
  6. Step 6: Final answer
    x = 468.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.