Home / 1,521.28-2,100.16-1,188.96

Finding the Fourth Proportional to 1,521.28, 2,100.16 and 1,188.96

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Solution

The fourth proportional to 1,521.28, 2,100.16 and 1,188.96 is: 1,641.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.28 : 2,100.16 = 1,188.96 : x
  2. Step 2: Convert to fraction form
    1,521.28/2,100.16 = 1,188.96/x
  3. Step 3: Cross multiply
    1,521.28x = 2,100.16 × 1,188.96
  4. Step 4: Simplify right side
    1,521.28x = 2,497,006.23
  5. Step 5: Solve for x
    x = 2,497,006.23/1,521.28
  6. Step 6: Final answer
    x = 1,641.39

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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.