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Finding the Fourth Proportional to 346.55, 477.65 and 276.36

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Solution

The fourth proportional to 346.55, 477.65 and 276.36 is: 380.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.55 : 477.65 = 276.36 : x
  2. Step 2: Convert to fraction form
    346.55/477.65 = 276.36/x
  3. Step 3: Cross multiply
    346.55x = 477.65 × 276.36
  4. Step 4: Simplify right side
    346.55x = 132,001.97
  5. Step 5: Solve for x
    x = 132,001.97/346.55
  6. Step 6: Final answer
    x = 380.91

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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.