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Finding the Fourth Proportional to 1,440.54, 2,161.04 and 618.82

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Solution

The fourth proportional to 1,440.54, 2,161.04 and 618.82 is: 928.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.54 : 2,161.04 = 618.82 : x
  2. Step 2: Convert to fraction form
    1,440.54/2,161.04 = 618.82/x
  3. Step 3: Cross multiply
    1,440.54x = 2,161.04 × 618.82
  4. Step 4: Simplify right side
    1,440.54x = 1,337,294.77
  5. Step 5: Solve for x
    x = 1,337,294.77/1,440.54
  6. Step 6: Final answer
    x = 928.33

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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.