Home / 2,686.38-3,707.60-1,639.05

Finding the Fourth Proportional to 2,686.38, 3,707.60 and 1,639.05

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Solution

The fourth proportional to 2,686.38, 3,707.60 and 1,639.05 is: 2,262.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.38 : 3,707.60 = 1,639.05 : x
  2. Step 2: Convert to fraction form
    2,686.38/3,707.60 = 1,639.05/x
  3. Step 3: Cross multiply
    2,686.38x = 3,707.60 × 1,639.05
  4. Step 4: Simplify right side
    2,686.38x = 6,076,941.78
  5. Step 5: Solve for x
    x = 6,076,941.78/2,686.38
  6. Step 6: Final answer
    x = 2,262.13

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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.