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Finding the Fourth Proportional to 563.81, 777.78 and 354.24

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Solution

The fourth proportional to 563.81, 777.78 and 354.24 is: 488.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.81 : 777.78 = 354.24 : x
  2. Step 2: Convert to fraction form
    563.81/777.78 = 354.24/x
  3. Step 3: Cross multiply
    563.81x = 777.78 × 354.24
  4. Step 4: Simplify right side
    563.81x = 275,520.79
  5. Step 5: Solve for x
    x = 275,520.79/563.81
  6. Step 6: Final answer
    x = 488.68

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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.