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Finding the Fourth Proportional to 684.81, 1,022.24 and 634.05

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Solution

The fourth proportional to 684.81, 1,022.24 and 634.05 is: 946.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.81 : 1,022.24 = 634.05 : x
  2. Step 2: Convert to fraction form
    684.81/1,022.24 = 634.05/x
  3. Step 3: Cross multiply
    684.81x = 1,022.24 × 634.05
  4. Step 4: Simplify right side
    684.81x = 648,148.10
  5. Step 5: Solve for x
    x = 648,148.10/684.81
  6. Step 6: Final answer
    x = 946.46

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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.