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Finding the Fourth Proportional to 1,403.52, 2,105.94 and 623.40

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Solution

The fourth proportional to 1,403.52, 2,105.94 and 623.40 is: 935.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.52 : 2,105.94 = 623.40 : x
  2. Step 2: Convert to fraction form
    1,403.52/2,105.94 = 623.40/x
  3. Step 3: Cross multiply
    1,403.52x = 2,105.94 × 623.40
  4. Step 4: Simplify right side
    1,403.52x = 1,312,843.00
  5. Step 5: Solve for x
    x = 1,312,843.00/1,403.52
  6. Step 6: Final answer
    x = 935.39

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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.