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Finding the Fourth Proportional to 570.15, 855.29 and 185.31

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Solution

The fourth proportional to 570.15, 855.29 and 185.31 is: 277.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.15 : 855.29 = 185.31 : x
  2. Step 2: Convert to fraction form
    570.15/855.29 = 185.31/x
  3. Step 3: Cross multiply
    570.15x = 855.29 × 185.31
  4. Step 4: Simplify right side
    570.15x = 158,492.86
  5. Step 5: Solve for x
    x = 158,492.86/570.15
  6. Step 6: Final answer
    x = 277.98

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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.