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Finding the Fourth Proportional to 1,790.58, 2,470.96 and 993.85

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Solution

The fourth proportional to 1,790.58, 2,470.96 and 993.85 is: 1,371.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.58 : 2,470.96 = 993.85 : x
  2. Step 2: Convert to fraction form
    1,790.58/2,470.96 = 993.85/x
  3. Step 3: Cross multiply
    1,790.58x = 2,470.96 × 993.85
  4. Step 4: Simplify right side
    1,790.58x = 2,455,768.67
  5. Step 5: Solve for x
    x = 2,455,768.67/1,790.58
  6. Step 6: Final answer
    x = 1,371.50

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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.