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Finding the Fourth Proportional to 993.12, 1,370.88 and 733.20

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Solution

The fourth proportional to 993.12, 1,370.88 and 733.20 is: 1,012.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.12 : 1,370.88 = 733.20 : x
  2. Step 2: Convert to fraction form
    993.12/1,370.88 = 733.20/x
  3. Step 3: Cross multiply
    993.12x = 1,370.88 × 733.20
  4. Step 4: Simplify right side
    993.12x = 1,005,129.22
  5. Step 5: Solve for x
    x = 1,005,129.22/993.12
  6. Step 6: Final answer
    x = 1,012.09

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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.