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Finding the Fourth Proportional to 994.54, 1,373.10 and 640.62

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Solution

The fourth proportional to 994.54, 1,373.10 and 640.62 is: 884.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.54 : 1,373.10 = 640.62 : x
  2. Step 2: Convert to fraction form
    994.54/1,373.10 = 640.62/x
  3. Step 3: Cross multiply
    994.54x = 1,373.10 × 640.62
  4. Step 4: Simplify right side
    994.54x = 879,635.32
  5. Step 5: Solve for x
    x = 879,635.32/994.54
  6. Step 6: Final answer
    x = 884.46

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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.