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Finding the Fourth Proportional to 563.25, 777.30 and 330.39

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Solution

The fourth proportional to 563.25, 777.30 and 330.39 is: 455.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.25 : 777.30 = 330.39 : x
  2. Step 2: Convert to fraction form
    563.25/777.30 = 330.39/x
  3. Step 3: Cross multiply
    563.25x = 777.30 × 330.39
  4. Step 4: Simplify right side
    563.25x = 256,812.15
  5. Step 5: Solve for x
    x = 256,812.15/563.25
  6. Step 6: Final answer
    x = 455.95

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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.