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Finding the Fourth Proportional to 346.28, 477.60 and 215.16

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Solution

The fourth proportional to 346.28, 477.60 and 215.16 is: 296.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.28 : 477.60 = 215.16 : x
  2. Step 2: Convert to fraction form
    346.28/477.60 = 215.16/x
  3. Step 3: Cross multiply
    346.28x = 477.60 × 215.16
  4. Step 4: Simplify right side
    346.28x = 102,757.82
  5. Step 5: Solve for x
    x = 102,757.82/346.28
  6. Step 6: Final answer
    x = 296.75

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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.