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Finding the Fourth Proportional to 477.24, 715.75 and 213.72

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Solution

The fourth proportional to 477.24, 715.75 and 213.72 is: 320.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.24 : 715.75 = 213.72 : x
  2. Step 2: Convert to fraction form
    477.24/715.75 = 213.72/x
  3. Step 3: Cross multiply
    477.24x = 715.75 × 213.72
  4. Step 4: Simplify right side
    477.24x = 152,965.44
  5. Step 5: Solve for x
    x = 152,965.44/477.24
  6. Step 6: Final answer
    x = 320.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.