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Finding the Fourth Proportional to 561.99, 843.18 and 395.40

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Solution

The fourth proportional to 561.99, 843.18 and 395.40 is: 593.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.99 : 843.18 = 395.40 : x
  2. Step 2: Convert to fraction form
    561.99/843.18 = 395.40/x
  3. Step 3: Cross multiply
    561.99x = 843.18 × 395.40
  4. Step 4: Simplify right side
    561.99x = 333,393.37
  5. Step 5: Solve for x
    x = 333,393.37/561.99
  6. Step 6: Final answer
    x = 593.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.