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Finding the Fourth Proportional to 993.91, 1,372.35 and 601.45

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Solution

The fourth proportional to 993.91, 1,372.35 and 601.45 is: 830.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.91 : 1,372.35 = 601.45 : x
  2. Step 2: Convert to fraction form
    993.91/1,372.35 = 601.45/x
  3. Step 3: Cross multiply
    993.91x = 1,372.35 × 601.45
  4. Step 4: Simplify right side
    993.91x = 825,399.91
  5. Step 5: Solve for x
    x = 825,399.91/993.91
  6. Step 6: Final answer
    x = 830.46

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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.