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Finding the Fourth Proportional to 684.81, 944.98 and 386.08

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Solution

The fourth proportional to 684.81, 944.98 and 386.08 is: 532.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.81 : 944.98 = 386.08 : x
  2. Step 2: Convert to fraction form
    684.81/944.98 = 386.08/x
  3. Step 3: Cross multiply
    684.81x = 944.98 × 386.08
  4. Step 4: Simplify right side
    684.81x = 364,834.55
  5. Step 5: Solve for x
    x = 364,834.55/684.81
  6. Step 6: Final answer
    x = 532.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.