Home / 1,645.92-2,272.32-1,308.96

Finding the Fourth Proportional to 1,645.92, 2,272.32 and 1,308.96

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Solution

The fourth proportional to 1,645.92, 2,272.32 and 1,308.96 is: 1,807.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.92 : 2,272.32 = 1,308.96 : x
  2. Step 2: Convert to fraction form
    1,645.92/2,272.32 = 1,308.96/x
  3. Step 3: Cross multiply
    1,645.92x = 2,272.32 × 1,308.96
  4. Step 4: Simplify right side
    1,645.92x = 2,974,375.99
  5. Step 5: Solve for x
    x = 2,974,375.99/1,645.92
  6. Step 6: Final answer
    x = 1,807.12

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1.5x scale

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.