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Finding the Fourth Proportional to 993.66, 1,374.33 and 785.89

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Solution

The fourth proportional to 993.66, 1,374.33 and 785.89 is: 1,086.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.66 : 1,374.33 = 785.89 : x
  2. Step 2: Convert to fraction form
    993.66/1,374.33 = 785.89/x
  3. Step 3: Cross multiply
    993.66x = 1,374.33 × 785.89
  4. Step 4: Simplify right side
    993.66x = 1,080,072.20
  5. Step 5: Solve for x
    x = 1,080,072.20/993.66
  6. Step 6: Final answer
    x = 1,086.96

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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.