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Finding the Fourth Proportional to 563.28, 777.18 and 330.28

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Solution

The fourth proportional to 563.28, 777.18 and 330.28 is: 455.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.28 : 777.18 = 330.28 : x
  2. Step 2: Convert to fraction form
    563.28/777.18 = 330.28/x
  3. Step 3: Cross multiply
    563.28x = 777.18 × 330.28
  4. Step 4: Simplify right side
    563.28x = 256,687.01
  5. Step 5: Solve for x
    x = 256,687.01/563.28
  6. Step 6: Final answer
    x = 455.70

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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.