Home / 1,660.28-2,290.80-997.35

Finding the Fourth Proportional to 1,660.28, 2,290.80 and 997.35

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Solution

The fourth proportional to 1,660.28, 2,290.80 and 997.35 is: 1,376.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.28 : 2,290.80 = 997.35 : x
  2. Step 2: Convert to fraction form
    1,660.28/2,290.80 = 997.35/x
  3. Step 3: Cross multiply
    1,660.28x = 2,290.80 × 997.35
  4. Step 4: Simplify right side
    1,660.28x = 2,284,718.92
  5. Step 5: Solve for x
    x = 2,284,718.92/1,660.28
  6. Step 6: Final answer
    x = 1,376.10

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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.