Home / 1,389.32-2,083.95-927.99

Finding the Fourth Proportional to 1,389.32, 2,083.95 and 927.99

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Solution

The fourth proportional to 1,389.32, 2,083.95 and 927.99 is: 1,391.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.32 : 2,083.95 = 927.99 : x
  2. Step 2: Convert to fraction form
    1,389.32/2,083.95 = 927.99/x
  3. Step 3: Cross multiply
    1,389.32x = 2,083.95 × 927.99
  4. Step 4: Simplify right side
    1,389.32x = 1,933,884.76
  5. Step 5: Solve for x
    x = 1,933,884.76/1,389.32
  6. Step 6: Final answer
    x = 1,391.97

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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.