Home / 2,087.50-3,130.87-917.29

Finding the Fourth Proportional to 2,087.50, 3,130.87 and 917.29

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Solution

The fourth proportional to 2,087.50, 3,130.87 and 917.29 is: 1,375.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.50 : 3,130.87 = 917.29 : x
  2. Step 2: Convert to fraction form
    2,087.50/3,130.87 = 917.29/x
  3. Step 3: Cross multiply
    2,087.50x = 3,130.87 × 917.29
  4. Step 4: Simplify right side
    2,087.50x = 2,871,915.74
  5. Step 5: Solve for x
    x = 2,871,915.74/2,087.50
  6. Step 6: Final answer
    x = 1,375.77

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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.