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Finding the Fourth Proportional to 570.85, 855.57 and 296.78

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Solution

The fourth proportional to 570.85, 855.57 and 296.78 is: 444.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.85 : 855.57 = 296.78 : x
  2. Step 2: Convert to fraction form
    570.85/855.57 = 296.78/x
  3. Step 3: Cross multiply
    570.85x = 855.57 × 296.78
  4. Step 4: Simplify right side
    570.85x = 253,914.58
  5. Step 5: Solve for x
    x = 253,914.58/570.85
  6. Step 6: Final answer
    x = 444.80

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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.