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Finding the Fourth Proportional to 458.93, 686.66 and 273.15

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Solution

The fourth proportional to 458.93, 686.66 and 273.15 is: 408.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.93 : 686.66 = 273.15 : x
  2. Step 2: Convert to fraction form
    458.93/686.66 = 273.15/x
  3. Step 3: Cross multiply
    458.93x = 686.66 × 273.15
  4. Step 4: Simplify right side
    458.93x = 187,559.81
  5. Step 5: Solve for x
    x = 187,559.81/458.93
  6. Step 6: Final answer
    x = 408.69

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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.