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Finding the Fourth Proportional to 472.69, 652.21 and 276.16

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Solution

The fourth proportional to 472.69, 652.21 and 276.16 is: 381.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.69 : 652.21 = 276.16 : x
  2. Step 2: Convert to fraction form
    472.69/652.21 = 276.16/x
  3. Step 3: Cross multiply
    472.69x = 652.21 × 276.16
  4. Step 4: Simplify right side
    472.69x = 180,114.31
  5. Step 5: Solve for x
    x = 180,114.31/472.69
  6. Step 6: Final answer
    x = 381.05

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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.