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Finding the Fourth Proportional to 1,516.85, 2,092.54 and 985.69

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Solution

The fourth proportional to 1,516.85, 2,092.54 and 985.69 is: 1,359.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,516.85 : 2,092.54 = 985.69 : x
  2. Step 2: Convert to fraction form
    1,516.85/2,092.54 = 985.69/x
  3. Step 3: Cross multiply
    1,516.85x = 2,092.54 × 985.69
  4. Step 4: Simplify right side
    1,516.85x = 2,062,595.75
  5. Step 5: Solve for x
    x = 2,062,595.75/1,516.85
  6. Step 6: Final answer
    x = 1,359.79

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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.