Home / 3,105.31-4,285.38-1,779.13

Finding the Fourth Proportional to 3,105.31, 4,285.38 and 1,779.13

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Solution

The fourth proportional to 3,105.31, 4,285.38 and 1,779.13 is: 2,455.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.31 : 4,285.38 = 1,779.13 : x
  2. Step 2: Convert to fraction form
    3,105.31/4,285.38 = 1,779.13/x
  3. Step 3: Cross multiply
    3,105.31x = 4,285.38 × 1,779.13
  4. Step 4: Simplify right side
    3,105.31x = 7,624,248.12
  5. Step 5: Solve for x
    x = 7,624,248.12/3,105.31
  6. Step 6: Final answer
    x = 2,455.23

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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.