Home / 1,641.38-2,265.10-1,118.32

Finding the Fourth Proportional to 1,641.38, 2,265.10 and 1,118.32

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Solution

The fourth proportional to 1,641.38, 2,265.10 and 1,118.32 is: 1,543.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641.38 : 2,265.10 = 1,118.32 : x
  2. Step 2: Convert to fraction form
    1,641.38/2,265.10 = 1,118.32/x
  3. Step 3: Cross multiply
    1,641.38x = 2,265.10 × 1,118.32
  4. Step 4: Simplify right side
    1,641.38x = 2,533,098.17
  5. Step 5: Solve for x
    x = 2,533,098.17/1,641.38
  6. Step 6: Final answer
    x = 1,543.28

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Double 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.