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Finding the Fourth Proportional to 674.68, 931.26 and 666.04

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Solution

The fourth proportional to 674.68, 931.26 and 666.04 is: 919.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.68 : 931.26 = 666.04 : x
  2. Step 2: Convert to fraction form
    674.68/931.26 = 666.04/x
  3. Step 3: Cross multiply
    674.68x = 931.26 × 666.04
  4. Step 4: Simplify right side
    674.68x = 620,256.41
  5. Step 5: Solve for x
    x = 620,256.41/674.68
  6. Step 6: Final answer
    x = 919.33

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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.