Home / 2,800.38-3,863.91-1,681.17

Finding the Fourth Proportional to 2,800.38, 3,863.91 and 1,681.17

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Solution

The fourth proportional to 2,800.38, 3,863.91 and 1,681.17 is: 2,319.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.38 : 3,863.91 = 1,681.17 : x
  2. Step 2: Convert to fraction form
    2,800.38/3,863.91 = 1,681.17/x
  3. Step 3: Cross multiply
    2,800.38x = 3,863.91 × 1,681.17
  4. Step 4: Simplify right side
    2,800.38x = 6,495,889.57
  5. Step 5: Solve for x
    x = 6,495,889.57/2,800.38
  6. Step 6: Final answer
    x = 2,319.65

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Half scale
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Double scale
Find fourth proportional to 2,801.38, 3,865.29 and 1,682.17
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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.