Home / 1,521.41-2,101.80-1,205.66

Finding the Fourth Proportional to 1,521.41, 2,101.80 and 1,205.66

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Solution

The fourth proportional to 1,521.41, 2,101.80 and 1,205.66 is: 1,665.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.41 : 2,101.80 = 1,205.66 : x
  2. Step 2: Convert to fraction form
    1,521.41/2,101.80 = 1,205.66/x
  3. Step 3: Cross multiply
    1,521.41x = 2,101.80 × 1,205.66
  4. Step 4: Simplify right side
    1,521.41x = 2,534,053.27
  5. Step 5: Solve for x
    x = 2,534,053.27/1,521.41
  6. Step 6: Final answer
    x = 1,665.60

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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.