Home / 1,781.39-2,670.19-904.55

Finding the Fourth Proportional to 1,781.39, 2,670.19 and 904.55

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Solution

The fourth proportional to 1,781.39, 2,670.19 and 904.55 is: 1,355.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.39 : 2,670.19 = 904.55 : x
  2. Step 2: Convert to fraction form
    1,781.39/2,670.19 = 904.55/x
  3. Step 3: Cross multiply
    1,781.39x = 2,670.19 × 904.55
  4. Step 4: Simplify right side
    1,781.39x = 2,415,304.75
  5. Step 5: Solve for x
    x = 2,415,304.75/1,781.39
  6. Step 6: Final answer
    x = 1,355.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.