Home / 1,929.54-2,663.37-1,221.60

Finding the Fourth Proportional to 1,929.54, 2,663.37 and 1,221.60

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Solution

The fourth proportional to 1,929.54, 2,663.37 and 1,221.60 is: 1,686.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.54 : 2,663.37 = 1,221.60 : x
  2. Step 2: Convert to fraction form
    1,929.54/2,663.37 = 1,221.60/x
  3. Step 3: Cross multiply
    1,929.54x = 2,663.37 × 1,221.60
  4. Step 4: Simplify right side
    1,929.54x = 3,253,572.79
  5. Step 5: Solve for x
    x = 3,253,572.79/1,929.54
  6. Step 6: Final answer
    x = 1,686.19

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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.