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Finding the Fourth Proportional to 370.12, 553.46 and 278.92

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Solution

The fourth proportional to 370.12, 553.46 and 278.92 is: 417.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.12 : 553.46 = 278.92 : x
  2. Step 2: Convert to fraction form
    370.12/553.46 = 278.92/x
  3. Step 3: Cross multiply
    370.12x = 553.46 × 278.92
  4. Step 4: Simplify right side
    370.12x = 154,371.06
  5. Step 5: Solve for x
    x = 154,371.06/370.12
  6. Step 6: Final answer
    x = 417.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.