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Finding the Fourth Proportional to 479.33, 655.78 and 477.28

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Solution

The fourth proportional to 479.33, 655.78 and 477.28 is: 652.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.33 : 655.78 = 477.28 : x
  2. Step 2: Convert to fraction form
    479.33/655.78 = 477.28/x
  3. Step 3: Cross multiply
    479.33x = 655.78 × 477.28
  4. Step 4: Simplify right side
    479.33x = 312,990.68
  5. Step 5: Solve for x
    x = 312,990.68/479.33
  6. Step 6: Final answer
    x = 652.98

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.