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Finding the Fourth Proportional to 570.65, 855.94 and 159.78

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Solution

The fourth proportional to 570.65, 855.94 and 159.78 is: 239.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.65 : 855.94 = 159.78 : x
  2. Step 2: Convert to fraction form
    570.65/855.94 = 159.78/x
  3. Step 3: Cross multiply
    570.65x = 855.94 × 159.78
  4. Step 4: Simplify right side
    570.65x = 136,762.09
  5. Step 5: Solve for x
    x = 136,762.09/570.65
  6. Step 6: Final answer
    x = 239.66

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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.