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Finding the Fourth Proportional to 996.04, 1,375.16 and 623.16

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Solution

The fourth proportional to 996.04, 1,375.16 and 623.16 is: 860.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.04 : 1,375.16 = 623.16 : x
  2. Step 2: Convert to fraction form
    996.04/1,375.16 = 623.16/x
  3. Step 3: Cross multiply
    996.04x = 1,375.16 × 623.16
  4. Step 4: Simplify right side
    996.04x = 856,944.71
  5. Step 5: Solve for x
    x = 856,944.71/996.04
  6. Step 6: Final answer
    x = 860.35

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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.