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Finding the Fourth Proportional to 477, 715.76 and 394.92

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Solution

The fourth proportional to 477, 715.76 and 394.92 is: 592.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    477 : 715.76 = 394.92 : x
  2. Step 2: Convert to fraction form
    477/715.76 = 394.92/x
  3. Step 3: Cross multiply
    477x = 715.76 × 394.92
  4. Step 4: Simplify right side
    477x = 282,667.94
  5. Step 5: Solve for x
    x = 282,667.94/477
  6. Step 6: Final answer
    x = 592.60

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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.