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Finding the Fourth Proportional to 1,659.12, 2,289.30 and 996.12

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Solution

The fourth proportional to 1,659.12, 2,289.30 and 996.12 is: 1,374.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,659.12 : 2,289.30 = 996.12 : x
  2. Step 2: Convert to fraction form
    1,659.12/2,289.30 = 996.12/x
  3. Step 3: Cross multiply
    1,659.12x = 2,289.30 × 996.12
  4. Step 4: Simplify right side
    1,659.12x = 2,280,417.52
  5. Step 5: Solve for x
    x = 2,280,417.52/1,659.12
  6. Step 6: Final answer
    x = 1,374.47

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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.