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Finding the Fourth Proportional to 659.75, 910.51 and 423.86

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Solution

The fourth proportional to 659.75, 910.51 and 423.86 is: 584.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.75 : 910.51 = 423.86 : x
  2. Step 2: Convert to fraction form
    659.75/910.51 = 423.86/x
  3. Step 3: Cross multiply
    659.75x = 910.51 × 423.86
  4. Step 4: Simplify right side
    659.75x = 385,923.16
  5. Step 5: Solve for x
    x = 385,923.16/659.75
  6. Step 6: Final answer
    x = 584.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.