Home / 1,909.40-2,634.90-1,112.64

Finding the Fourth Proportional to 1,909.40, 2,634.90 and 1,112.64

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Solution

The fourth proportional to 1,909.40, 2,634.90 and 1,112.64 is: 1,535.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.40 : 2,634.90 = 1,112.64 : x
  2. Step 2: Convert to fraction form
    1,909.40/2,634.90 = 1,112.64/x
  3. Step 3: Cross multiply
    1,909.40x = 2,634.90 × 1,112.64
  4. Step 4: Simplify right side
    1,909.40x = 2,931,695.14
  5. Step 5: Solve for x
    x = 2,931,695.14/1,909.40
  6. Step 6: Final answer
    x = 1,535.40

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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.