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Finding the Fourth Proportional to 637.68, 950.70 and 621.72

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Solution

The fourth proportional to 637.68, 950.70 and 621.72 is: 926.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.68 : 950.70 = 621.72 : x
  2. Step 2: Convert to fraction form
    637.68/950.70 = 621.72/x
  3. Step 3: Cross multiply
    637.68x = 950.70 × 621.72
  4. Step 4: Simplify right side
    637.68x = 591,069.20
  5. Step 5: Solve for x
    x = 591,069.20/637.68
  6. Step 6: Final answer
    x = 926.91

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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.