Home / 3,103.47-4,282.84-1,687.19

Finding the Fourth Proportional to 3,103.47, 4,282.84 and 1,687.19

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Solution

The fourth proportional to 3,103.47, 4,282.84 and 1,687.19 is: 2,328.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,103.47 : 4,282.84 = 1,687.19 : x
  2. Step 2: Convert to fraction form
    3,103.47/4,282.84 = 1,687.19/x
  3. Step 3: Cross multiply
    3,103.47x = 4,282.84 × 1,687.19
  4. Step 4: Simplify right side
    3,103.47x = 7,225,961.58
  5. Step 5: Solve for x
    x = 7,225,961.58/3,103.47
  6. Step 6: Final answer
    x = 2,328.35

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Half scale
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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.