Home / 3,145.19-4,340.14-1,728.60

Finding the Fourth Proportional to 3,145.19, 4,340.14 and 1,728.60

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Solution

The fourth proportional to 3,145.19, 4,340.14 and 1,728.60 is: 2,385.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.19 : 4,340.14 = 1,728.60 : x
  2. Step 2: Convert to fraction form
    3,145.19/4,340.14 = 1,728.60/x
  3. Step 3: Cross multiply
    3,145.19x = 4,340.14 × 1,728.60
  4. Step 4: Simplify right side
    3,145.19x = 7,502,366.00
  5. Step 5: Solve for x
    x = 7,502,366.00/3,145.19
  6. Step 6: Final answer
    x = 2,385.35

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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.