Home / 1,421.22-1,962.24-1,089.06

Finding the Fourth Proportional to 1,421.22, 1,962.24 and 1,089.06

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Solution

The fourth proportional to 1,421.22, 1,962.24 and 1,089.06 is: 1,503.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.22 : 1,962.24 = 1,089.06 : x
  2. Step 2: Convert to fraction form
    1,421.22/1,962.24 = 1,089.06/x
  3. Step 3: Cross multiply
    1,421.22x = 1,962.24 × 1,089.06
  4. Step 4: Simplify right side
    1,421.22x = 2,136,997.09
  5. Step 5: Solve for x
    x = 2,136,997.09/1,421.22
  6. Step 6: Final answer
    x = 1,503.64

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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.