Home / 1,403.76-1,935-1,125.12

Finding the Fourth Proportional to 1,403.76, 1,935 and 1,125.12

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Solution

The fourth proportional to 1,403.76, 1,935 and 1,125.12 is: 1,550.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.76 : 1,935 = 1,125.12 : x
  2. Step 2: Convert to fraction form
    1,403.76/1,935 = 1,125.12/x
  3. Step 3: Cross multiply
    1,403.76x = 1,935 × 1,125.12
  4. Step 4: Simplify right side
    1,403.76x = 2,177,107.20
  5. Step 5: Solve for x
    x = 2,177,107.20/1,403.76
  6. Step 6: Final answer
    x = 1,550.91

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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.