Home / 1,929.80-2,661.45-1,556.66

Finding the Fourth Proportional to 1,929.80, 2,661.45 and 1,556.66

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Solution

The fourth proportional to 1,929.80, 2,661.45 and 1,556.66 is: 2,146.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.80 : 2,661.45 = 1,556.66 : x
  2. Step 2: Convert to fraction form
    1,929.80/2,661.45 = 1,556.66/x
  3. Step 3: Cross multiply
    1,929.80x = 2,661.45 × 1,556.66
  4. Step 4: Simplify right side
    1,929.80x = 4,142,972.76
  5. Step 5: Solve for x
    x = 4,142,972.76/1,929.80
  6. Step 6: Final answer
    x = 2,146.84

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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.