Home / 1,781.21-2,669.91-904.36

Finding the Fourth Proportional to 1,781.21, 2,669.91 and 904.36

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Solution

The fourth proportional to 1,781.21, 2,669.91 and 904.36 is: 1,355.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.21 : 2,669.91 = 904.36 : x
  2. Step 2: Convert to fraction form
    1,781.21/2,669.91 = 904.36/x
  3. Step 3: Cross multiply
    1,781.21x = 2,669.91 × 904.36
  4. Step 4: Simplify right side
    1,781.21x = 2,414,549.74
  5. Step 5: Solve for x
    x = 2,414,549.74/1,781.21
  6. Step 6: Final answer
    x = 1,355.57

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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.