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Finding the Fourth Proportional to 310.08, 425.28 and 302.88

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Solution

The fourth proportional to 310.08, 425.28 and 302.88 is: 415.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.08 : 425.28 = 302.88 : x
  2. Step 2: Convert to fraction form
    310.08/425.28 = 302.88/x
  3. Step 3: Cross multiply
    310.08x = 425.28 × 302.88
  4. Step 4: Simplify right side
    310.08x = 128,808.81
  5. Step 5: Solve for x
    x = 128,808.81/310.08
  6. Step 6: Final answer
    x = 415.41

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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.