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Finding the Fourth Proportional to 477.89, 716.98 and 387.37

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Solution

The fourth proportional to 477.89, 716.98 and 387.37 is: 581.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.89 : 716.98 = 387.37 : x
  2. Step 2: Convert to fraction form
    477.89/716.98 = 387.37/x
  3. Step 3: Cross multiply
    477.89x = 716.98 × 387.37
  4. Step 4: Simplify right side
    477.89x = 277,736.54
  5. Step 5: Solve for x
    x = 277,736.54/477.89
  6. Step 6: Final answer
    x = 581.17

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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.