Home / 1,289.29-1,931.23-1,069.41

Finding the Fourth Proportional to 1,289.29, 1,931.23 and 1,069.41

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Solution

The fourth proportional to 1,289.29, 1,931.23 and 1,069.41 is: 1,601.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.29 : 1,931.23 = 1,069.41 : x
  2. Step 2: Convert to fraction form
    1,289.29/1,931.23 = 1,069.41/x
  3. Step 3: Cross multiply
    1,289.29x = 1,931.23 × 1,069.41
  4. Step 4: Simplify right side
    1,289.29x = 2,065,276.67
  5. Step 5: Solve for x
    x = 2,065,276.67/1,289.29
  6. Step 6: Final answer
    x = 1,601.87

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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.