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Finding the Fourth Proportional to 563.30, 777.66 and 397.66

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Solution

The fourth proportional to 563.30, 777.66 and 397.66 is: 548.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.30 : 777.66 = 397.66 : x
  2. Step 2: Convert to fraction form
    563.30/777.66 = 397.66/x
  3. Step 3: Cross multiply
    563.30x = 777.66 × 397.66
  4. Step 4: Simplify right side
    563.30x = 309,244.28
  5. Step 5: Solve for x
    x = 309,244.28/563.30
  6. Step 6: Final answer
    x = 548.99

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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.