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Finding the Fourth Proportional to 310.68, 425.48 and 306.63

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Solution

The fourth proportional to 310.68, 425.48 and 306.63 is: 419.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.68 : 425.48 = 306.63 : x
  2. Step 2: Convert to fraction form
    310.68/425.48 = 306.63/x
  3. Step 3: Cross multiply
    310.68x = 425.48 × 306.63
  4. Step 4: Simplify right side
    310.68x = 130,463.40
  5. Step 5: Solve for x
    x = 130,463.40/310.68
  6. Step 6: Final answer
    x = 419.93

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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.