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Finding the Fourth Proportional to 477.78, 715.46 and 404.88

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Solution

The fourth proportional to 477.78, 715.46 and 404.88 is: 606.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.78 : 715.46 = 404.88 : x
  2. Step 2: Convert to fraction form
    477.78/715.46 = 404.88/x
  3. Step 3: Cross multiply
    477.78x = 715.46 × 404.88
  4. Step 4: Simplify right side
    477.78x = 289,675.44
  5. Step 5: Solve for x
    x = 289,675.44/477.78
  6. Step 6: Final answer
    x = 606.29

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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.