Home / 1,390.96-2,087.05-1,237.26

Finding the Fourth Proportional to 1,390.96, 2,087.05 and 1,237.26

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Solution

The fourth proportional to 1,390.96, 2,087.05 and 1,237.26 is: 1,856.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.96 : 2,087.05 = 1,237.26 : x
  2. Step 2: Convert to fraction form
    1,390.96/2,087.05 = 1,237.26/x
  3. Step 3: Cross multiply
    1,390.96x = 2,087.05 × 1,237.26
  4. Step 4: Simplify right side
    1,390.96x = 2,582,223.48
  5. Step 5: Solve for x
    x = 2,582,223.48/1,390.96
  6. Step 6: Final answer
    x = 1,856.43

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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.