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Finding the Fourth Proportional to 477.89, 659.61 and 281.67

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Solution

The fourth proportional to 477.89, 659.61 and 281.67 is: 388.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.89 : 659.61 = 281.67 : x
  2. Step 2: Convert to fraction form
    477.89/659.61 = 281.67/x
  3. Step 3: Cross multiply
    477.89x = 659.61 × 281.67
  4. Step 4: Simplify right side
    477.89x = 185,792.35
  5. Step 5: Solve for x
    x = 185,792.35/477.89
  6. Step 6: Final answer
    x = 388.78

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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.