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Finding the Fourth Proportional to 655.01, 981.23 and 380.52

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Solution

The fourth proportional to 655.01, 981.23 and 380.52 is: 570.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.01 : 981.23 = 380.52 : x
  2. Step 2: Convert to fraction form
    655.01/981.23 = 380.52/x
  3. Step 3: Cross multiply
    655.01x = 981.23 × 380.52
  4. Step 4: Simplify right side
    655.01x = 373,375.74
  5. Step 5: Solve for x
    x = 373,375.74/655.01
  6. Step 6: Final answer
    x = 570.03

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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.