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Finding the Fourth Proportional to 563.48, 777.88 and 353.78

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Solution

The fourth proportional to 563.48, 777.88 and 353.78 is: 488.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.48 : 777.88 = 353.78 : x
  2. Step 2: Convert to fraction form
    563.48/777.88 = 353.78/x
  3. Step 3: Cross multiply
    563.48x = 777.88 × 353.78
  4. Step 4: Simplify right side
    563.48x = 275,198.39
  5. Step 5: Solve for x
    x = 275,198.39/563.48
  6. Step 6: Final answer
    x = 488.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.