Home / 1,538.21-2,125.01-1,421.57

Finding the Fourth Proportional to 1,538.21, 2,125.01 and 1,421.57

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Solution

The fourth proportional to 1,538.21, 2,125.01 and 1,421.57 is: 1,963.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.21 : 2,125.01 = 1,421.57 : x
  2. Step 2: Convert to fraction form
    1,538.21/2,125.01 = 1,421.57/x
  3. Step 3: Cross multiply
    1,538.21x = 2,125.01 × 1,421.57
  4. Step 4: Simplify right side
    1,538.21x = 3,020,859.33
  5. Step 5: Solve for x
    x = 3,020,859.33/1,538.21
  6. Step 6: Final answer
    x = 1,963.88

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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.