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Finding the Fourth Proportional to 681.04, 1,022.80 and 623.92

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Solution

The fourth proportional to 681.04, 1,022.80 and 623.92 is: 937.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.04 : 1,022.80 = 623.92 : x
  2. Step 2: Convert to fraction form
    681.04/1,022.80 = 623.92/x
  3. Step 3: Cross multiply
    681.04x = 1,022.80 × 623.92
  4. Step 4: Simplify right side
    681.04x = 638,145.38
  5. Step 5: Solve for x
    x = 638,145.38/681.04
  6. Step 6: Final answer
    x = 937.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.