Home / 1,322.32-1,981.63-1,126.30

Finding the Fourth Proportional to 1,322.32, 1,981.63 and 1,126.30

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Solution

The fourth proportional to 1,322.32, 1,981.63 and 1,126.30 is: 1,687.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.32 : 1,981.63 = 1,126.30 : x
  2. Step 2: Convert to fraction form
    1,322.32/1,981.63 = 1,126.30/x
  3. Step 3: Cross multiply
    1,322.32x = 1,981.63 × 1,126.30
  4. Step 4: Simplify right side
    1,322.32x = 2,231,909.87
  5. Step 5: Solve for x
    x = 2,231,909.87/1,322.32
  6. Step 6: Final answer
    x = 1,687.87

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1.5x scale

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.