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Finding the Fourth Proportional to 1,853.53, 2,781.39 and 684.35

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Solution

The fourth proportional to 1,853.53, 2,781.39 and 684.35 is: 1,026.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,853.53 : 2,781.39 = 684.35 : x
  2. Step 2: Convert to fraction form
    1,853.53/2,781.39 = 684.35/x
  3. Step 3: Cross multiply
    1,853.53x = 2,781.39 × 684.35
  4. Step 4: Simplify right side
    1,853.53x = 1,903,444.25
  5. Step 5: Solve for x
    x = 1,903,444.25/1,853.53
  6. Step 6: Final answer
    x = 1,026.93

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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.