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Finding the Fourth Proportional to 1,621.72, 2,237.98 and 923.08

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Solution

The fourth proportional to 1,621.72, 2,237.98 and 923.08 is: 1,273.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.72 : 2,237.98 = 923.08 : x
  2. Step 2: Convert to fraction form
    1,621.72/2,237.98 = 923.08/x
  3. Step 3: Cross multiply
    1,621.72x = 2,237.98 × 923.08
  4. Step 4: Simplify right side
    1,621.72x = 2,065,834.58
  5. Step 5: Solve for x
    x = 2,065,834.58/1,621.72
  6. Step 6: Final answer
    x = 1,273.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.