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Finding the Fourth Proportional to 1,146.78, 1,716.06 and 993.24

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Solution

The fourth proportional to 1,146.78, 1,716.06 and 993.24 is: 1,486.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.78 : 1,716.06 = 993.24 : x
  2. Step 2: Convert to fraction form
    1,146.78/1,716.06 = 993.24/x
  3. Step 3: Cross multiply
    1,146.78x = 1,716.06 × 993.24
  4. Step 4: Simplify right side
    1,146.78x = 1,704,459.43
  5. Step 5: Solve for x
    x = 1,704,459.43/1,146.78
  6. Step 6: Final answer
    x = 1,486.30

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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.