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Finding the Fourth Proportional to 1,293.18, 1,784.87 and 851.12

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Solution

The fourth proportional to 1,293.18, 1,784.87 and 851.12 is: 1,174.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.18 : 1,784.87 = 851.12 : x
  2. Step 2: Convert to fraction form
    1,293.18/1,784.87 = 851.12/x
  3. Step 3: Cross multiply
    1,293.18x = 1,784.87 × 851.12
  4. Step 4: Simplify right side
    1,293.18x = 1,519,138.55
  5. Step 5: Solve for x
    x = 1,519,138.55/1,293.18
  6. Step 6: Final answer
    x = 1,174.73

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1.5x scale

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.