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Finding the Fourth Proportional to 644.15, 957.93 and 623.64

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Solution

The fourth proportional to 644.15, 957.93 and 623.64 is: 927.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.15 : 957.93 = 623.64 : x
  2. Step 2: Convert to fraction form
    644.15/957.93 = 623.64/x
  3. Step 3: Cross multiply
    644.15x = 957.93 × 623.64
  4. Step 4: Simplify right side
    644.15x = 597,403.47
  5. Step 5: Solve for x
    x = 597,403.47/644.15
  6. Step 6: Final answer
    x = 927.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.