Home / 2,115.08-2,918.56-1,230.76

Finding the Fourth Proportional to 2,115.08, 2,918.56 and 1,230.76

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Solution

The fourth proportional to 2,115.08, 2,918.56 and 1,230.76 is: 1,698.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.08 : 2,918.56 = 1,230.76 : x
  2. Step 2: Convert to fraction form
    2,115.08/2,918.56 = 1,230.76/x
  3. Step 3: Cross multiply
    2,115.08x = 2,918.56 × 1,230.76
  4. Step 4: Simplify right side
    2,115.08x = 3,592,046.91
  5. Step 5: Solve for x
    x = 3,592,046.91/2,115.08
  6. Step 6: Final answer
    x = 1,698.30

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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.