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Finding the Fourth Proportional to 563.08, 777.20 and 330.36

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Solution

The fourth proportional to 563.08, 777.20 and 330.36 is: 455.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.08 : 777.20 = 330.36 : x
  2. Step 2: Convert to fraction form
    563.08/777.20 = 330.36/x
  3. Step 3: Cross multiply
    563.08x = 777.20 × 330.36
  4. Step 4: Simplify right side
    563.08x = 256,755.79
  5. Step 5: Solve for x
    x = 256,755.79/563.08
  6. Step 6: Final answer
    x = 455.98

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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.