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Finding the Fourth Proportional to 278.35, 415.07 and 275.88

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Solution

The fourth proportional to 278.35, 415.07 and 275.88 is: 411.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.35 : 415.07 = 275.88 : x
  2. Step 2: Convert to fraction form
    278.35/415.07 = 275.88/x
  3. Step 3: Cross multiply
    278.35x = 415.07 × 275.88
  4. Step 4: Simplify right side
    278.35x = 114,506.06
  5. Step 5: Solve for x
    x = 114,506.06/278.35
  6. Step 6: Final answer
    x = 411.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.