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Finding the Fourth Proportional to 2,225.65, 3,337.78 and 764.45

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Solution

The fourth proportional to 2,225.65, 3,337.78 and 764.45 is: 1,146.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,225.65 : 3,337.78 = 764.45 : x
  2. Step 2: Convert to fraction form
    2,225.65/3,337.78 = 764.45/x
  3. Step 3: Cross multiply
    2,225.65x = 3,337.78 × 764.45
  4. Step 4: Simplify right side
    2,225.65x = 2,551,562.10
  5. Step 5: Solve for x
    x = 2,551,562.10/2,225.65
  6. Step 6: Final answer
    x = 1,146.44

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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.