Home / 1,639.86-2,265.30-1,142.25

Finding the Fourth Proportional to 1,639.86, 2,265.30 and 1,142.25

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Solution

The fourth proportional to 1,639.86, 2,265.30 and 1,142.25 is: 1,577.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.86 : 2,265.30 = 1,142.25 : x
  2. Step 2: Convert to fraction form
    1,639.86/2,265.30 = 1,142.25/x
  3. Step 3: Cross multiply
    1,639.86x = 2,265.30 × 1,142.25
  4. Step 4: Simplify right side
    1,639.86x = 2,587,538.93
  5. Step 5: Solve for x
    x = 2,587,538.93/1,639.86
  6. Step 6: Final answer
    x = 1,577.90

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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.