Home / 1,645.11-2,269.62-1,224.72

Finding the Fourth Proportional to 1,645.11, 2,269.62 and 1,224.72

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Solution

The fourth proportional to 1,645.11, 2,269.62 and 1,224.72 is: 1,689.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.11 : 2,269.62 = 1,224.72 : x
  2. Step 2: Convert to fraction form
    1,645.11/2,269.62 = 1,224.72/x
  3. Step 3: Cross multiply
    1,645.11x = 2,269.62 × 1,224.72
  4. Step 4: Simplify right side
    1,645.11x = 2,779,649.01
  5. Step 5: Solve for x
    x = 2,779,649.01/1,645.11
  6. Step 6: Final answer
    x = 1,689.64

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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.