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Finding the Fourth Proportional to 565.99, 781.09 and 317.30

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Solution

The fourth proportional to 565.99, 781.09 and 317.30 is: 437.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.99 : 781.09 = 317.30 : x
  2. Step 2: Convert to fraction form
    565.99/781.09 = 317.30/x
  3. Step 3: Cross multiply
    565.99x = 781.09 × 317.30
  4. Step 4: Simplify right side
    565.99x = 247,835.16
  5. Step 5: Solve for x
    x = 247,835.16/565.99
  6. Step 6: Final answer
    x = 437.88

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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.