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Finding the Fourth Proportional to 310.32, 424.89 and 309.24

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Solution

The fourth proportional to 310.32, 424.89 and 309.24 is: 423.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.32 : 424.89 = 309.24 : x
  2. Step 2: Convert to fraction form
    310.32/424.89 = 309.24/x
  3. Step 3: Cross multiply
    310.32x = 424.89 × 309.24
  4. Step 4: Simplify right side
    310.32x = 131,392.98
  5. Step 5: Solve for x
    x = 131,392.98/310.32
  6. Step 6: Final answer
    x = 423.41

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.