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Finding the Fourth Proportional to 477.79, 659.90 and 338.26

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Solution

The fourth proportional to 477.79, 659.90 and 338.26 is: 467.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.79 : 659.90 = 338.26 : x
  2. Step 2: Convert to fraction form
    477.79/659.90 = 338.26/x
  3. Step 3: Cross multiply
    477.79x = 659.90 × 338.26
  4. Step 4: Simplify right side
    477.79x = 223,217.77
  5. Step 5: Solve for x
    x = 223,217.77/477.79
  6. Step 6: Final answer
    x = 467.19

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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.