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Finding the Fourth Proportional to 1,187.12, 1,777.02 and 1,012.16

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Solution

The fourth proportional to 1,187.12, 1,777.02 and 1,012.16 is: 1,515.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.12 : 1,777.02 = 1,012.16 : x
  2. Step 2: Convert to fraction form
    1,187.12/1,777.02 = 1,012.16/x
  3. Step 3: Cross multiply
    1,187.12x = 1,777.02 × 1,012.16
  4. Step 4: Simplify right side
    1,187.12x = 1,798,619.68
  5. Step 5: Solve for x
    x = 1,798,619.68/1,187.12
  6. Step 6: Final answer
    x = 1,515.12

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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.