Home / 1,126.41-1,687.01-1,087.49

Finding the Fourth Proportional to 1,126.41, 1,687.01 and 1,087.49

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Solution

The fourth proportional to 1,126.41, 1,687.01 and 1,087.49 is: 1,628.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.41 : 1,687.01 = 1,087.49 : x
  2. Step 2: Convert to fraction form
    1,126.41/1,687.01 = 1,087.49/x
  3. Step 3: Cross multiply
    1,126.41x = 1,687.01 × 1,087.49
  4. Step 4: Simplify right side
    1,126.41x = 1,834,606.50
  5. Step 5: Solve for x
    x = 1,834,606.50/1,126.41
  6. Step 6: Final answer
    x = 1,628.72

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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.