Home / 2,646.15-3,970.85-1,086.90

Finding the Fourth Proportional to 2,646.15, 3,970.85 and 1,086.90

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Solution

The fourth proportional to 2,646.15, 3,970.85 and 1,086.90 is: 1,631.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,646.15 : 3,970.85 = 1,086.90 : x
  2. Step 2: Convert to fraction form
    2,646.15/3,970.85 = 1,086.90/x
  3. Step 3: Cross multiply
    2,646.15x = 3,970.85 × 1,086.90
  4. Step 4: Simplify right side
    2,646.15x = 4,315,911.43
  5. Step 5: Solve for x
    x = 4,315,911.43/2,646.15
  6. Step 6: Final answer
    x = 1,631.02

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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.