Home / 2,185.13-3,278.24-646.13

Finding the Fourth Proportional to 2,185.13, 3,278.24 and 646.13

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Solution

The fourth proportional to 2,185.13, 3,278.24 and 646.13 is: 969.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.13 : 3,278.24 = 646.13 : x
  2. Step 2: Convert to fraction form
    2,185.13/3,278.24 = 646.13/x
  3. Step 3: Cross multiply
    2,185.13x = 3,278.24 × 646.13
  4. Step 4: Simplify right side
    2,185.13x = 2,118,154.44
  5. Step 5: Solve for x
    x = 2,118,154.44/2,185.13
  6. Step 6: Final answer
    x = 969.35

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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.