Home / 2,645.78-3,646.94-2,085.32

Finding the Fourth Proportional to 2,645.78, 3,646.94 and 2,085.32

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Solution

The fourth proportional to 2,645.78, 3,646.94 and 2,085.32 is: 2,874.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,645.78 : 3,646.94 = 2,085.32 : x
  2. Step 2: Convert to fraction form
    2,645.78/3,646.94 = 2,085.32/x
  3. Step 3: Cross multiply
    2,645.78x = 3,646.94 × 2,085.32
  4. Step 4: Simplify right side
    2,645.78x = 7,605,008.26
  5. Step 5: Solve for x
    x = 7,605,008.26/2,645.78
  6. Step 6: Final answer
    x = 2,874.40

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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.