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Finding the Fourth Proportional to 305.16, 458.65 and 251.39

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Solution

The fourth proportional to 305.16, 458.65 and 251.39 is: 377.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.16 : 458.65 = 251.39 : x
  2. Step 2: Convert to fraction form
    305.16/458.65 = 251.39/x
  3. Step 3: Cross multiply
    305.16x = 458.65 × 251.39
  4. Step 4: Simplify right side
    305.16x = 115,300.02
  5. Step 5: Solve for x
    x = 115,300.02/305.16
  6. Step 6: Final answer
    x = 377.83

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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.