Home / 1,521.96-2,100-1,190.40

Finding the Fourth Proportional to 1,521.96, 2,100 and 1,190.40

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Solution

The fourth proportional to 1,521.96, 2,100 and 1,190.40 is: 1,642.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.96 : 2,100 = 1,190.40 : x
  2. Step 2: Convert to fraction form
    1,521.96/2,100 = 1,190.40/x
  3. Step 3: Cross multiply
    1,521.96x = 2,100 × 1,190.40
  4. Step 4: Simplify right side
    1,521.96x = 2,499,840
  5. Step 5: Solve for x
    x = 2,499,840/1,521.96
  6. Step 6: Final answer
    x = 1,642.51

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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.