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Finding the Fourth Proportional to 570.43, 855.65 and 262.19

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Solution

The fourth proportional to 570.43, 855.65 and 262.19 is: 393.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.43 : 855.65 = 262.19 : x
  2. Step 2: Convert to fraction form
    570.43/855.65 = 262.19/x
  3. Step 3: Cross multiply
    570.43x = 855.65 × 262.19
  4. Step 4: Simplify right side
    570.43x = 224,344.19
  5. Step 5: Solve for x
    x = 224,344.19/570.43
  6. Step 6: Final answer
    x = 393.29

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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.