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Finding the Fourth Proportional to 1,440.93, 2,161.92 and 608.21

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Solution

The fourth proportional to 1,440.93, 2,161.92 and 608.21 is: 912.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.93 : 2,161.92 = 608.21 : x
  2. Step 2: Convert to fraction form
    1,440.93/2,161.92 = 608.21/x
  3. Step 3: Cross multiply
    1,440.93x = 2,161.92 × 608.21
  4. Step 4: Simplify right side
    1,440.93x = 1,314,890.55
  5. Step 5: Solve for x
    x = 1,314,890.55/1,440.93
  6. Step 6: Final answer
    x = 912.53

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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.