Home / 1,645.38-2,270.66-1,316.16

Finding the Fourth Proportional to 1,645.38, 2,270.66 and 1,316.16

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Solution

The fourth proportional to 1,645.38, 2,270.66 and 1,316.16 is: 1,816.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.38 : 2,270.66 = 1,316.16 : x
  2. Step 2: Convert to fraction form
    1,645.38/2,270.66 = 1,316.16/x
  3. Step 3: Cross multiply
    1,645.38x = 2,270.66 × 1,316.16
  4. Step 4: Simplify right side
    1,645.38x = 2,988,545.28
  5. Step 5: Solve for x
    x = 2,988,545.28/1,645.38
  6. Step 6: Final answer
    x = 1,816.33

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Half scale
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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.