Home / 1,217.86-1,818.24-1,103.06

Finding the Fourth Proportional to 1,217.86, 1,818.24 and 1,103.06

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Solution

The fourth proportional to 1,217.86, 1,818.24 and 1,103.06 is: 1,646.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.86 : 1,818.24 = 1,103.06 : x
  2. Step 2: Convert to fraction form
    1,217.86/1,818.24 = 1,103.06/x
  3. Step 3: Cross multiply
    1,217.86x = 1,818.24 × 1,103.06
  4. Step 4: Simplify right side
    1,217.86x = 2,005,627.81
  5. Step 5: Solve for x
    x = 2,005,627.81/1,217.86
  6. Step 6: Final answer
    x = 1,646.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.