Home / 1,281.39-1,921.77-587.62

Finding the Fourth Proportional to 1,281.39, 1,921.77 and 587.62

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Solution

The fourth proportional to 1,281.39, 1,921.77 and 587.62 is: 881.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.39 : 1,921.77 = 587.62 : x
  2. Step 2: Convert to fraction form
    1,281.39/1,921.77 = 587.62/x
  3. Step 3: Cross multiply
    1,281.39x = 1,921.77 × 587.62
  4. Step 4: Simplify right side
    1,281.39x = 1,129,270.49
  5. Step 5: Solve for x
    x = 1,129,270.49/1,281.39
  6. Step 6: Final answer
    x = 881.29

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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.