Home / 1,403.10-1,938.11-1,138.53

Finding the Fourth Proportional to 1,403.10, 1,938.11 and 1,138.53

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Solution

The fourth proportional to 1,403.10, 1,938.11 and 1,138.53 is: 1,572.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.10 : 1,938.11 = 1,138.53 : x
  2. Step 2: Convert to fraction form
    1,403.10/1,938.11 = 1,138.53/x
  3. Step 3: Cross multiply
    1,403.10x = 1,938.11 × 1,138.53
  4. Step 4: Simplify right side
    1,403.10x = 2,206,596.38
  5. Step 5: Solve for x
    x = 2,206,596.38/1,403.10
  6. Step 6: Final answer
    x = 1,572.66

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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.