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Finding the Fourth Proportional to 565.21, 779.90 and 344.23

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Solution

The fourth proportional to 565.21, 779.90 and 344.23 is: 474.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.21 : 779.90 = 344.23 : x
  2. Step 2: Convert to fraction form
    565.21/779.90 = 344.23/x
  3. Step 3: Cross multiply
    565.21x = 779.90 × 344.23
  4. Step 4: Simplify right side
    565.21x = 268,468.60
  5. Step 5: Solve for x
    x = 268,468.60/565.21
  6. Step 6: Final answer
    x = 474.99

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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.