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Finding the Fourth Proportional to 477.24, 712.44 and 443.40

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Solution

The fourth proportional to 477.24, 712.44 and 443.40 is: 661.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.24 : 712.44 = 443.40 : x
  2. Step 2: Convert to fraction form
    477.24/712.44 = 443.40/x
  3. Step 3: Cross multiply
    477.24x = 712.44 × 443.40
  4. Step 4: Simplify right side
    477.24x = 315,895.90
  5. Step 5: Solve for x
    x = 315,895.90/477.24
  6. Step 6: Final answer
    x = 661.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.