Home / 1,126.09-1,690.35-945.46

Finding the Fourth Proportional to 1,126.09, 1,690.35 and 945.46

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Solution

The fourth proportional to 1,126.09, 1,690.35 and 945.46 is: 1,419.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.09 : 1,690.35 = 945.46 : x
  2. Step 2: Convert to fraction form
    1,126.09/1,690.35 = 945.46/x
  3. Step 3: Cross multiply
    1,126.09x = 1,690.35 × 945.46
  4. Step 4: Simplify right side
    1,126.09x = 1,598,158.31
  5. Step 5: Solve for x
    x = 1,598,158.31/1,126.09
  6. Step 6: Final answer
    x = 1,419.21

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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.