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Finding the Fourth Proportional to 563.63, 777.89 and 330.76

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Solution

The fourth proportional to 563.63, 777.89 and 330.76 is: 456.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.63 : 777.89 = 330.76 : x
  2. Step 2: Convert to fraction form
    563.63/777.89 = 330.76/x
  3. Step 3: Cross multiply
    563.63x = 777.89 × 330.76
  4. Step 4: Simplify right side
    563.63x = 257,294.90
  5. Step 5: Solve for x
    x = 257,294.90/563.63
  6. Step 6: Final answer
    x = 456.50

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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.