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Finding the Fourth Proportional to 563.33, 777.40 and 311.27

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Solution

The fourth proportional to 563.33, 777.40 and 311.27 is: 429.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.33 : 777.40 = 311.27 : x
  2. Step 2: Convert to fraction form
    563.33/777.40 = 311.27/x
  3. Step 3: Cross multiply
    563.33x = 777.40 × 311.27
  4. Step 4: Simplify right side
    563.33x = 241,976.63
  5. Step 5: Solve for x
    x = 241,976.63/563.33
  6. Step 6: Final answer
    x = 429.55

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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.