Home / 1,438.92-2,158.38-929.16

Finding the Fourth Proportional to 1,438.92, 2,158.38 and 929.16

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Solution

The fourth proportional to 1,438.92, 2,158.38 and 929.16 is: 1,393.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.92 : 2,158.38 = 929.16 : x
  2. Step 2: Convert to fraction form
    1,438.92/2,158.38 = 929.16/x
  3. Step 3: Cross multiply
    1,438.92x = 2,158.38 × 929.16
  4. Step 4: Simplify right side
    1,438.92x = 2,005,480.36
  5. Step 5: Solve for x
    x = 2,005,480.36/1,438.92
  6. Step 6: Final answer
    x = 1,393.74

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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.