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Finding the Fourth Proportional to 1,842.51, 2,543.71 and 1,214.86

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Solution

The fourth proportional to 1,842.51, 2,543.71 and 1,214.86 is: 1,677.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,842.51 : 2,543.71 = 1,214.86 : x
  2. Step 2: Convert to fraction form
    1,842.51/2,543.71 = 1,214.86/x
  3. Step 3: Cross multiply
    1,842.51x = 2,543.71 × 1,214.86
  4. Step 4: Simplify right side
    1,842.51x = 3,090,251.53
  5. Step 5: Solve for x
    x = 3,090,251.53/1,842.51
  6. Step 6: Final answer
    x = 1,677.20

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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.