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Finding the Fourth Proportional to 563.20, 777.21 and 314.52

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Solution

The fourth proportional to 563.20, 777.21 and 314.52 is: 434.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.20 : 777.21 = 314.52 : x
  2. Step 2: Convert to fraction form
    563.20/777.21 = 314.52/x
  3. Step 3: Cross multiply
    563.20x = 777.21 × 314.52
  4. Step 4: Simplify right side
    563.20x = 244,448.09
  5. Step 5: Solve for x
    x = 244,448.09/563.20
  6. Step 6: Final answer
    x = 434.03

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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.