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Finding the Fourth Proportional to 660.04, 983.21 and 623.56

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Solution

The fourth proportional to 660.04, 983.21 and 623.56 is: 928.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.04 : 983.21 = 623.56 : x
  2. Step 2: Convert to fraction form
    660.04/983.21 = 623.56/x
  3. Step 3: Cross multiply
    660.04x = 983.21 × 623.56
  4. Step 4: Simplify right side
    660.04x = 613,090.43
  5. Step 5: Solve for x
    x = 613,090.43/660.04
  6. Step 6: Final answer
    x = 928.87

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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.