Home / 2,311.19-3,190.53-1,427.51

Finding the Fourth Proportional to 2,311.19, 3,190.53 and 1,427.51

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Solution

The fourth proportional to 2,311.19, 3,190.53 and 1,427.51 is: 1,970.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.19 : 3,190.53 = 1,427.51 : x
  2. Step 2: Convert to fraction form
    2,311.19/3,190.53 = 1,427.51/x
  3. Step 3: Cross multiply
    2,311.19x = 3,190.53 × 1,427.51
  4. Step 4: Simplify right side
    2,311.19x = 4,554,513.48
  5. Step 5: Solve for x
    x = 4,554,513.48/2,311.19
  6. Step 6: Final answer
    x = 1,970.64

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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.