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Finding the Fourth Proportional to 570.03, 855.05 and 137.19

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Solution

The fourth proportional to 570.03, 855.05 and 137.19 is: 205.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.03 : 855.05 = 137.19 : x
  2. Step 2: Convert to fraction form
    570.03/855.05 = 137.19/x
  3. Step 3: Cross multiply
    570.03x = 855.05 × 137.19
  4. Step 4: Simplify right side
    570.03x = 117,303.62
  5. Step 5: Solve for x
    x = 117,303.62/570.03
  6. Step 6: Final answer
    x = 205.79

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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.