Home / 1,189.21-1,637.08-1,022.45

Finding the Fourth Proportional to 1,189.21, 1,637.08 and 1,022.45

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Solution

The fourth proportional to 1,189.21, 1,637.08 and 1,022.45 is: 1,407.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.21 : 1,637.08 = 1,022.45 : x
  2. Step 2: Convert to fraction form
    1,189.21/1,637.08 = 1,022.45/x
  3. Step 3: Cross multiply
    1,189.21x = 1,637.08 × 1,022.45
  4. Step 4: Simplify right side
    1,189.21x = 1,673,832.45
  5. Step 5: Solve for x
    x = 1,673,832.45/1,189.21
  6. Step 6: Final answer
    x = 1,407.52

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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.