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Finding the Fourth Proportional to 279.93, 423.07 and 275.14

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Solution

The fourth proportional to 279.93, 423.07 and 275.14 is: 415.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.93 : 423.07 = 275.14 : x
  2. Step 2: Convert to fraction form
    279.93/423.07 = 275.14/x
  3. Step 3: Cross multiply
    279.93x = 423.07 × 275.14
  4. Step 4: Simplify right side
    279.93x = 116,403.48
  5. Step 5: Solve for x
    x = 116,403.48/279.93
  6. Step 6: Final answer
    x = 415.83

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.