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Finding the Fourth Proportional to 637.74, 951.78 and 621.34

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Solution

The fourth proportional to 637.74, 951.78 and 621.34 is: 927.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.74 : 951.78 = 621.34 : x
  2. Step 2: Convert to fraction form
    637.74/951.78 = 621.34/x
  3. Step 3: Cross multiply
    637.74x = 951.78 × 621.34
  4. Step 4: Simplify right side
    637.74x = 591,378.99
  5. Step 5: Solve for x
    x = 591,378.99/637.74
  6. Step 6: Final answer
    x = 927.30

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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.