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Finding the Fourth Proportional to 1,043.23, 1,439.97 and 623.88

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Solution

The fourth proportional to 1,043.23, 1,439.97 and 623.88 is: 861.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.23 : 1,439.97 = 623.88 : x
  2. Step 2: Convert to fraction form
    1,043.23/1,439.97 = 623.88/x
  3. Step 3: Cross multiply
    1,043.23x = 1,439.97 × 623.88
  4. Step 4: Simplify right side
    1,043.23x = 898,368.48
  5. Step 5: Solve for x
    x = 898,368.48/1,043.23
  6. Step 6: Final answer
    x = 861.14

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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.