Home / 1,281.36-1,765.92-1,001.16

Finding the Fourth Proportional to 1,281.36, 1,765.92 and 1,001.16

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Solution

The fourth proportional to 1,281.36, 1,765.92 and 1,001.16 is: 1,379.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.36 : 1,765.92 = 1,001.16 : x
  2. Step 2: Convert to fraction form
    1,281.36/1,765.92 = 1,001.16/x
  3. Step 3: Cross multiply
    1,281.36x = 1,765.92 × 1,001.16
  4. Step 4: Simplify right side
    1,281.36x = 1,767,968.47
  5. Step 5: Solve for x
    x = 1,767,968.47/1,281.36
  6. Step 6: Final answer
    x = 1,379.76

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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.