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Finding the Fourth Proportional to 1,784.67, 2,677.10 and 689.15

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Solution

The fourth proportional to 1,784.67, 2,677.10 and 689.15 is: 1,033.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,784.67 : 2,677.10 = 689.15 : x
  2. Step 2: Convert to fraction form
    1,784.67/2,677.10 = 689.15/x
  3. Step 3: Cross multiply
    1,784.67x = 2,677.10 × 689.15
  4. Step 4: Simplify right side
    1,784.67x = 1,844,906.63
  5. Step 5: Solve for x
    x = 1,844,906.63/1,784.67
  6. Step 6: Final answer
    x = 1,033.75

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1.5x scale

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.