Home / 2,087.75-3,130.41-917.71

Finding the Fourth Proportional to 2,087.75, 3,130.41 and 917.71

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Solution

The fourth proportional to 2,087.75, 3,130.41 and 917.71 is: 1,376.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.75 : 3,130.41 = 917.71 : x
  2. Step 2: Convert to fraction form
    2,087.75/3,130.41 = 917.71/x
  3. Step 3: Cross multiply
    2,087.75x = 3,130.41 × 917.71
  4. Step 4: Simplify right side
    2,087.75x = 2,872,808.56
  5. Step 5: Solve for x
    x = 2,872,808.56/2,087.75
  6. Step 6: Final answer
    x = 1,376.03

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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.