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Finding the Fourth Proportional to 472.78, 652.38 and 283.69

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Solution

The fourth proportional to 472.78, 652.38 and 283.69 is: 391.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.78 : 652.38 = 283.69 : x
  2. Step 2: Convert to fraction form
    472.78/652.38 = 283.69/x
  3. Step 3: Cross multiply
    472.78x = 652.38 × 283.69
  4. Step 4: Simplify right side
    472.78x = 185,073.68
  5. Step 5: Solve for x
    x = 185,073.68/472.78
  6. Step 6: Final answer
    x = 391.46

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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.