Home / 1,781.52-2,455.56-1,191.84

Finding the Fourth Proportional to 1,781.52, 2,455.56 and 1,191.84

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Solution

The fourth proportional to 1,781.52, 2,455.56 and 1,191.84 is: 1,642.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.52 : 2,455.56 = 1,191.84 : x
  2. Step 2: Convert to fraction form
    1,781.52/2,455.56 = 1,191.84/x
  3. Step 3: Cross multiply
    1,781.52x = 2,455.56 × 1,191.84
  4. Step 4: Simplify right side
    1,781.52x = 2,926,634.63
  5. Step 5: Solve for x
    x = 2,926,634.63/1,781.52
  6. Step 6: Final answer
    x = 1,642.77

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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.