Home / 1,377.28-1,900.70-985.24

Finding the Fourth Proportional to 1,377.28, 1,900.70 and 985.24

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Solution

The fourth proportional to 1,377.28, 1,900.70 and 985.24 is: 1,359.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.28 : 1,900.70 = 985.24 : x
  2. Step 2: Convert to fraction form
    1,377.28/1,900.70 = 985.24/x
  3. Step 3: Cross multiply
    1,377.28x = 1,900.70 × 985.24
  4. Step 4: Simplify right side
    1,377.28x = 1,872,645.67
  5. Step 5: Solve for x
    x = 1,872,645.67/1,377.28
  6. Step 6: Final answer
    x = 1,359.67

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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.