Home / 1,281.03-1,921.59-1,076.91

Finding the Fourth Proportional to 1,281.03, 1,921.59 and 1,076.91

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Solution

The fourth proportional to 1,281.03, 1,921.59 and 1,076.91 is: 1,615.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.03 : 1,921.59 = 1,076.91 : x
  2. Step 2: Convert to fraction form
    1,281.03/1,921.59 = 1,076.91/x
  3. Step 3: Cross multiply
    1,281.03x = 1,921.59 × 1,076.91
  4. Step 4: Simplify right side
    1,281.03x = 2,069,379.49
  5. Step 5: Solve for x
    x = 2,069,379.49/1,281.03
  6. Step 6: Final answer
    x = 1,615.40

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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.