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Finding the Fourth Proportional to 1,660.62, 2,290.59 and 997.68

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Solution

The fourth proportional to 1,660.62, 2,290.59 and 997.68 is: 1,376.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.62 : 2,290.59 = 997.68 : x
  2. Step 2: Convert to fraction form
    1,660.62/2,290.59 = 997.68/x
  3. Step 3: Cross multiply
    1,660.62x = 2,290.59 × 997.68
  4. Step 4: Simplify right side
    1,660.62x = 2,285,275.83
  5. Step 5: Solve for x
    x = 2,285,275.83/1,660.62
  6. Step 6: Final answer
    x = 1,376.16

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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.