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Finding the Fourth Proportional to 1,146.60, 1,715.78 and 993.06

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Solution

The fourth proportional to 1,146.60, 1,715.78 and 993.06 is: 1,486.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.60 : 1,715.78 = 993.06 : x
  2. Step 2: Convert to fraction form
    1,146.60/1,715.78 = 993.06/x
  3. Step 3: Cross multiply
    1,146.60x = 1,715.78 × 993.06
  4. Step 4: Simplify right side
    1,146.60x = 1,703,872.49
  5. Step 5: Solve for x
    x = 1,703,872.49/1,146.60
  6. Step 6: Final answer
    x = 1,486.02

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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.