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Finding the Fourth Proportional to 1,966.62, 2,947.77 and 992.46

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Solution

The fourth proportional to 1,966.62, 2,947.77 and 992.46 is: 1,487.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,966.62 : 2,947.77 = 992.46 : x
  2. Step 2: Convert to fraction form
    1,966.62/2,947.77 = 992.46/x
  3. Step 3: Cross multiply
    1,966.62x = 2,947.77 × 992.46
  4. Step 4: Simplify right side
    1,966.62x = 2,925,543.81
  5. Step 5: Solve for x
    x = 2,925,543.81/1,966.62
  6. Step 6: Final answer
    x = 1,487.60

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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.