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Finding the Fourth Proportional to 703.15, 969.17 and 644.31

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Solution

The fourth proportional to 703.15, 969.17 and 644.31 is: 888.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.15 : 969.17 = 644.31 : x
  2. Step 2: Convert to fraction form
    703.15/969.17 = 644.31/x
  3. Step 3: Cross multiply
    703.15x = 969.17 × 644.31
  4. Step 4: Simplify right side
    703.15x = 624,442.70
  5. Step 5: Solve for x
    x = 624,442.70/703.15
  6. Step 6: Final answer
    x = 888.07

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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.