Home / 1,189.58-1,637.87-1,012.19

Finding the Fourth Proportional to 1,189.58, 1,637.87 and 1,012.19

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Solution

The fourth proportional to 1,189.58, 1,637.87 and 1,012.19 is: 1,393.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.58 : 1,637.87 = 1,012.19 : x
  2. Step 2: Convert to fraction form
    1,189.58/1,637.87 = 1,012.19/x
  3. Step 3: Cross multiply
    1,189.58x = 1,637.87 × 1,012.19
  4. Step 4: Simplify right side
    1,189.58x = 1,657,822.39
  5. Step 5: Solve for x
    x = 1,657,822.39/1,189.58
  6. Step 6: Final answer
    x = 1,393.63

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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.