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Finding the Fourth Proportional to 563.55, 777.78 and 342.60

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Solution

The fourth proportional to 563.55, 777.78 and 342.60 is: 472.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.55 : 777.78 = 342.60 : x
  2. Step 2: Convert to fraction form
    563.55/777.78 = 342.60/x
  3. Step 3: Cross multiply
    563.55x = 777.78 × 342.60
  4. Step 4: Simplify right side
    563.55x = 266,467.43
  5. Step 5: Solve for x
    x = 266,467.43/563.55
  6. Step 6: Final answer
    x = 472.84

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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.