Home / 1,038.16-1,439.32-985.44

Finding the Fourth Proportional to 1,038.16, 1,439.32 and 985.44

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Solution

The fourth proportional to 1,038.16, 1,439.32 and 985.44 is: 1,366.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.16 : 1,439.32 = 985.44 : x
  2. Step 2: Convert to fraction form
    1,038.16/1,439.32 = 985.44/x
  3. Step 3: Cross multiply
    1,038.16x = 1,439.32 × 985.44
  4. Step 4: Simplify right side
    1,038.16x = 1,418,363.50
  5. Step 5: Solve for x
    x = 1,418,363.50/1,038.16
  6. Step 6: Final answer
    x = 1,366.23

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.