Home / 1,275.15-1,911.06-1,101.81

Finding the Fourth Proportional to 1,275.15, 1,911.06 and 1,101.81

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Solution

The fourth proportional to 1,275.15, 1,911.06 and 1,101.81 is: 1,651.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.15 : 1,911.06 = 1,101.81 : x
  2. Step 2: Convert to fraction form
    1,275.15/1,911.06 = 1,101.81/x
  3. Step 3: Cross multiply
    1,275.15x = 1,911.06 × 1,101.81
  4. Step 4: Simplify right side
    1,275.15x = 2,105,625.02
  5. Step 5: Solve for x
    x = 2,105,625.02/1,275.15
  6. Step 6: Final answer
    x = 1,651.28

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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.