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Finding the Fourth Proportional to 310.56, 427.68 and 297.60

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Solution

The fourth proportional to 310.56, 427.68 and 297.60 is: 409.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.56 : 427.68 = 297.60 : x
  2. Step 2: Convert to fraction form
    310.56/427.68 = 297.60/x
  3. Step 3: Cross multiply
    310.56x = 427.68 × 297.60
  4. Step 4: Simplify right side
    310.56x = 127,277.57
  5. Step 5: Solve for x
    x = 127,277.57/310.56
  6. Step 6: Final answer
    x = 409.83

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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.