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Finding the Fourth Proportional to 1,440.94, 2,161.56 and 619

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Solution

The fourth proportional to 1,440.94, 2,161.56 and 619 is: 928.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.94 : 2,161.56 = 619 : x
  2. Step 2: Convert to fraction form
    1,440.94/2,161.56 = 619/x
  3. Step 3: Cross multiply
    1,440.94x = 2,161.56 × 619
  4. Step 4: Simplify right side
    1,440.94x = 1,338,005.64
  5. Step 5: Solve for x
    x = 1,338,005.64/1,440.94
  6. Step 6: Final answer
    x = 928.56

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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.