Home / 2,649.08-3,970.60-1,087.09

Finding the Fourth Proportional to 2,649.08, 3,970.60 and 1,087.09

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Solution

The fourth proportional to 2,649.08, 3,970.60 and 1,087.09 is: 1,629.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,649.08 : 3,970.60 = 1,087.09 : x
  2. Step 2: Convert to fraction form
    2,649.08/3,970.60 = 1,087.09/x
  3. Step 3: Cross multiply
    2,649.08x = 3,970.60 × 1,087.09
  4. Step 4: Simplify right side
    2,649.08x = 4,316,386.91
  5. Step 5: Solve for x
    x = 4,316,386.91/2,649.08
  6. Step 6: Final answer
    x = 1,629.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.