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Finding the Fourth Proportional to 477.46, 716.80 and 261.19

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Solution

The fourth proportional to 477.46, 716.80 and 261.19 is: 392.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.46 : 716.80 = 261.19 : x
  2. Step 2: Convert to fraction form
    477.46/716.80 = 261.19/x
  3. Step 3: Cross multiply
    477.46x = 716.80 × 261.19
  4. Step 4: Simplify right side
    477.46x = 187,220.99
  5. Step 5: Solve for x
    x = 187,220.99/477.46
  6. Step 6: Final answer
    x = 392.12

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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.