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Finding the Fourth Proportional to 563.80, 778.18 and 342.88

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Solution

The fourth proportional to 563.80, 778.18 and 342.88 is: 473.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.80 : 778.18 = 342.88 : x
  2. Step 2: Convert to fraction form
    563.80/778.18 = 342.88/x
  3. Step 3: Cross multiply
    563.80x = 778.18 × 342.88
  4. Step 4: Simplify right side
    563.80x = 266,822.36
  5. Step 5: Solve for x
    x = 266,822.36/563.80
  6. Step 6: Final answer
    x = 473.26

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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.