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Finding the Fourth Proportional to 499.25, 689.28 and 342.14

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Solution

The fourth proportional to 499.25, 689.28 and 342.14 is: 472.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.25 : 689.28 = 342.14 : x
  2. Step 2: Convert to fraction form
    499.25/689.28 = 342.14/x
  3. Step 3: Cross multiply
    499.25x = 689.28 × 342.14
  4. Step 4: Simplify right side
    499.25x = 235,828.55
  5. Step 5: Solve for x
    x = 235,828.55/499.25
  6. Step 6: Final answer
    x = 472.37

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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.