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Finding the Fourth Proportional to 1,840.48, 2,761.80 and 687.04

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Solution

The fourth proportional to 1,840.48, 2,761.80 and 687.04 is: 1,030.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,840.48 : 2,761.80 = 687.04 : x
  2. Step 2: Convert to fraction form
    1,840.48/2,761.80 = 687.04/x
  3. Step 3: Cross multiply
    1,840.48x = 2,761.80 × 687.04
  4. Step 4: Simplify right side
    1,840.48x = 1,897,467.07
  5. Step 5: Solve for x
    x = 1,897,467.07/1,840.48
  6. Step 6: Final answer
    x = 1,030.96

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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.