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Finding the Fourth Proportional to 2,430.16, 3,645.87 and 764.21

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Solution

The fourth proportional to 2,430.16, 3,645.87 and 764.21 is: 1,146.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,430.16 : 3,645.87 = 764.21 : x
  2. Step 2: Convert to fraction form
    2,430.16/3,645.87 = 764.21/x
  3. Step 3: Cross multiply
    2,430.16x = 3,645.87 × 764.21
  4. Step 4: Simplify right side
    2,430.16x = 2,786,217.15
  5. Step 5: Solve for x
    x = 2,786,217.15/2,430.16
  6. Step 6: Final answer
    x = 1,146.52

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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.