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Finding the Fourth Proportional to 1,784.76, 2,677.82 and 689.19

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Solution

The fourth proportional to 1,784.76, 2,677.82 and 689.19 is: 1,034.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,784.76 : 2,677.82 = 689.19 : x
  2. Step 2: Convert to fraction form
    1,784.76/2,677.82 = 689.19/x
  3. Step 3: Cross multiply
    1,784.76x = 2,677.82 × 689.19
  4. Step 4: Simplify right side
    1,784.76x = 1,845,523.32
  5. Step 5: Solve for x
    x = 1,845,523.32/1,784.76
  6. Step 6: Final answer
    x = 1,034.05

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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.