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Finding the Fourth Proportional to 472.63, 652.22 and 288.63

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Solution

The fourth proportional to 472.63, 652.22 and 288.63 is: 398.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.63 : 652.22 = 288.63 : x
  2. Step 2: Convert to fraction form
    472.63/652.22 = 288.63/x
  3. Step 3: Cross multiply
    472.63x = 652.22 × 288.63
  4. Step 4: Simplify right side
    472.63x = 188,250.26
  5. Step 5: Solve for x
    x = 188,250.26/472.63
  6. Step 6: Final answer
    x = 398.30

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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.