Home / 1,769.30-2,440.95-1,139.78

Finding the Fourth Proportional to 1,769.30, 2,440.95 and 1,139.78

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Solution

The fourth proportional to 1,769.30, 2,440.95 and 1,139.78 is: 1,572.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,769.30 : 2,440.95 = 1,139.78 : x
  2. Step 2: Convert to fraction form
    1,769.30/2,440.95 = 1,139.78/x
  3. Step 3: Cross multiply
    1,769.30x = 2,440.95 × 1,139.78
  4. Step 4: Simplify right side
    1,769.30x = 2,782,140.50
  5. Step 5: Solve for x
    x = 2,782,140.50/1,769.30
  6. Step 6: Final answer
    x = 1,572.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.