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Finding the Fourth Proportional to 662.67, 987.52 and 623.72

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Solution

The fourth proportional to 662.67, 987.52 and 623.72 is: 929.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.67 : 987.52 = 623.72 : x
  2. Step 2: Convert to fraction form
    662.67/987.52 = 623.72/x
  3. Step 3: Cross multiply
    662.67x = 987.52 × 623.72
  4. Step 4: Simplify right side
    662.67x = 615,935.97
  5. Step 5: Solve for x
    x = 615,935.97/662.67
  6. Step 6: Final answer
    x = 929.48

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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.