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Finding the Fourth Proportional to 904.08, 1,246.32 and 667.68

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Solution

The fourth proportional to 904.08, 1,246.32 and 667.68 is: 920.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.08 : 1,246.32 = 667.68 : x
  2. Step 2: Convert to fraction form
    904.08/1,246.32 = 667.68/x
  3. Step 3: Cross multiply
    904.08x = 1,246.32 × 667.68
  4. Step 4: Simplify right side
    904.08x = 832,142.94
  5. Step 5: Solve for x
    x = 832,142.94/904.08
  6. Step 6: Final answer
    x = 920.43

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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.