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Finding the Fourth Proportional to 1,199.14, 1,655.46 and 918.50

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Solution

The fourth proportional to 1,199.14, 1,655.46 and 918.50 is: 1,268.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.14 : 1,655.46 = 918.50 : x
  2. Step 2: Convert to fraction form
    1,199.14/1,655.46 = 918.50/x
  3. Step 3: Cross multiply
    1,199.14x = 1,655.46 × 918.50
  4. Step 4: Simplify right side
    1,199.14x = 1,520,531.73
  5. Step 5: Solve for x
    x = 1,520,531.73/1,199.14
  6. Step 6: Final answer
    x = 1,268.02

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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.