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Finding the Fourth Proportional to 477.61, 715.38 and 395.09

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Solution

The fourth proportional to 477.61, 715.38 and 395.09 is: 591.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.61 : 715.38 = 395.09 : x
  2. Step 2: Convert to fraction form
    477.61/715.38 = 395.09/x
  3. Step 3: Cross multiply
    477.61x = 715.38 × 395.09
  4. Step 4: Simplify right side
    477.61x = 282,643.35
  5. Step 5: Solve for x
    x = 282,643.35/477.61
  6. Step 6: Final answer
    x = 591.78

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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.