Home / 1,912.50-2,868.75-525.78

Finding the Fourth Proportional to 1,912.50, 2,868.75 and 525.78

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Solution

The fourth proportional to 1,912.50, 2,868.75 and 525.78 is: 788.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.50 : 2,868.75 = 525.78 : x
  2. Step 2: Convert to fraction form
    1,912.50/2,868.75 = 525.78/x
  3. Step 3: Cross multiply
    1,912.50x = 2,868.75 × 525.78
  4. Step 4: Simplify right side
    1,912.50x = 1,508,331.38
  5. Step 5: Solve for x
    x = 1,508,331.38/1,912.50
  6. Step 6: Final answer
    x = 788.67

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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.