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Finding the Fourth Proportional to 440.67, 659.94 and 257.52

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Solution

The fourth proportional to 440.67, 659.94 and 257.52 is: 385.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.67 : 659.94 = 257.52 : x
  2. Step 2: Convert to fraction form
    440.67/659.94 = 257.52/x
  3. Step 3: Cross multiply
    440.67x = 659.94 × 257.52
  4. Step 4: Simplify right side
    440.67x = 169,947.75
  5. Step 5: Solve for x
    x = 169,947.75/440.67
  6. Step 6: Final answer
    x = 385.66

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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.