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Finding the Fourth Proportional to 1,868.73, 2,803.25 and 619.56

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Solution

The fourth proportional to 1,868.73, 2,803.25 and 619.56 is: 929.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.73 : 2,803.25 = 619.56 : x
  2. Step 2: Convert to fraction form
    1,868.73/2,803.25 = 619.56/x
  3. Step 3: Cross multiply
    1,868.73x = 2,803.25 × 619.56
  4. Step 4: Simplify right side
    1,868.73x = 1,736,781.57
  5. Step 5: Solve for x
    x = 1,736,781.57/1,868.73
  6. Step 6: Final answer
    x = 929.39

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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.