Home / 1,421.07-2,131.67-496.72

Finding the Fourth Proportional to 1,421.07, 2,131.67 and 496.72

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Solution

The fourth proportional to 1,421.07, 2,131.67 and 496.72 is: 745.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.07 : 2,131.67 = 496.72 : x
  2. Step 2: Convert to fraction form
    1,421.07/2,131.67 = 496.72/x
  3. Step 3: Cross multiply
    1,421.07x = 2,131.67 × 496.72
  4. Step 4: Simplify right side
    1,421.07x = 1,058,843.12
  5. Step 5: Solve for x
    x = 1,058,843.12/1,421.07
  6. Step 6: Final answer
    x = 745.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.