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Finding the Fourth Proportional to 472.78, 652.44 and 265.78

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Solution

The fourth proportional to 472.78, 652.44 and 265.78 is: 366.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.78 : 652.44 = 265.78 : x
  2. Step 2: Convert to fraction form
    472.78/652.44 = 265.78/x
  3. Step 3: Cross multiply
    472.78x = 652.44 × 265.78
  4. Step 4: Simplify right side
    472.78x = 173,405.50
  5. Step 5: Solve for x
    x = 173,405.50/472.78
  6. Step 6: Final answer
    x = 366.78

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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.