Home / 1,660.68-2,289.60-1,135.80

Finding the Fourth Proportional to 1,660.68, 2,289.60 and 1,135.80

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Solution

The fourth proportional to 1,660.68, 2,289.60 and 1,135.80 is: 1,565.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.68 : 2,289.60 = 1,135.80 : x
  2. Step 2: Convert to fraction form
    1,660.68/2,289.60 = 1,135.80/x
  3. Step 3: Cross multiply
    1,660.68x = 2,289.60 × 1,135.80
  4. Step 4: Simplify right side
    1,660.68x = 2,600,527.68
  5. Step 5: Solve for x
    x = 2,600,527.68/1,660.68
  6. Step 6: Final answer
    x = 1,565.94

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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.