Home / 1,909.28-2,634.60-1,412.20

Finding the Fourth Proportional to 1,909.28, 2,634.60 and 1,412.20

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Solution

The fourth proportional to 1,909.28, 2,634.60 and 1,412.20 is: 1,948.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.28 : 2,634.60 = 1,412.20 : x
  2. Step 2: Convert to fraction form
    1,909.28/2,634.60 = 1,412.20/x
  3. Step 3: Cross multiply
    1,909.28x = 2,634.60 × 1,412.20
  4. Step 4: Simplify right side
    1,909.28x = 3,720,582.12
  5. Step 5: Solve for x
    x = 3,720,582.12/1,909.28
  6. Step 6: Final answer
    x = 1,948.68

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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.