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Finding the Fourth Proportional to 1,491.73, 2,234.73 and 840.49

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Solution

The fourth proportional to 1,491.73, 2,234.73 and 840.49 is: 1,259.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491.73 : 2,234.73 = 840.49 : x
  2. Step 2: Convert to fraction form
    1,491.73/2,234.73 = 840.49/x
  3. Step 3: Cross multiply
    1,491.73x = 2,234.73 × 840.49
  4. Step 4: Simplify right side
    1,491.73x = 1,878,268.22
  5. Step 5: Solve for x
    x = 1,878,268.22/1,491.73
  6. Step 6: Final answer
    x = 1,259.12

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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.