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Finding the Fourth Proportional to 1,189.54, 1,637.84 and 1,012.16

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Solution

The fourth proportional to 1,189.54, 1,637.84 and 1,012.16 is: 1,393.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.54 : 1,637.84 = 1,012.16 : x
  2. Step 2: Convert to fraction form
    1,189.54/1,637.84 = 1,012.16/x
  3. Step 3: Cross multiply
    1,189.54x = 1,637.84 × 1,012.16
  4. Step 4: Simplify right side
    1,189.54x = 1,657,756.13
  5. Step 5: Solve for x
    x = 1,657,756.13/1,189.54
  6. Step 6: Final answer
    x = 1,393.61

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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.