Home / 1,639.13-2,262.92-1,135.72

Finding the Fourth Proportional to 1,639.13, 2,262.92 and 1,135.72

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Solution

The fourth proportional to 1,639.13, 2,262.92 and 1,135.72 is: 1,567.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.13 : 2,262.92 = 1,135.72 : x
  2. Step 2: Convert to fraction form
    1,639.13/2,262.92 = 1,135.72/x
  3. Step 3: Cross multiply
    1,639.13x = 2,262.92 × 1,135.72
  4. Step 4: Simplify right side
    1,639.13x = 2,570,032.19
  5. Step 5: Solve for x
    x = 2,570,032.19/1,639.13
  6. Step 6: Final answer
    x = 1,567.92

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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.