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Finding the Fourth Proportional to 771.03, 1,156.55 and 223.21

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Solution

The fourth proportional to 771.03, 1,156.55 and 223.21 is: 334.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.03 : 1,156.55 = 223.21 : x
  2. Step 2: Convert to fraction form
    771.03/1,156.55 = 223.21/x
  3. Step 3: Cross multiply
    771.03x = 1,156.55 × 223.21
  4. Step 4: Simplify right side
    771.03x = 258,153.53
  5. Step 5: Solve for x
    x = 258,153.53/771.03
  6. Step 6: Final answer
    x = 334.82

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Double scale
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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.