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Finding the Fourth Proportional to 484.79, 668.84 and 288.18

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Solution

The fourth proportional to 484.79, 668.84 and 288.18 is: 397.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.79 : 668.84 = 288.18 : x
  2. Step 2: Convert to fraction form
    484.79/668.84 = 288.18/x
  3. Step 3: Cross multiply
    484.79x = 668.84 × 288.18
  4. Step 4: Simplify right side
    484.79x = 192,744.87
  5. Step 5: Solve for x
    x = 192,744.87/484.79
  6. Step 6: Final answer
    x = 397.59

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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.