Home / 1,521.29-2,100.58-1,189.15

Finding the Fourth Proportional to 1,521.29, 2,100.58 and 1,189.15

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Solution

The fourth proportional to 1,521.29, 2,100.58 and 1,189.15 is: 1,641.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.29 : 2,100.58 = 1,189.15 : x
  2. Step 2: Convert to fraction form
    1,521.29/2,100.58 = 1,189.15/x
  3. Step 3: Cross multiply
    1,521.29x = 2,100.58 × 1,189.15
  4. Step 4: Simplify right side
    1,521.29x = 2,497,896.48
  5. Step 5: Solve for x
    x = 2,497,896.48/1,521.29
  6. Step 6: Final answer
    x = 1,641.96

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1.5x scale

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.