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Finding the Fourth Proportional to 674.52, 931.26 and 488.62

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Solution

The fourth proportional to 674.52, 931.26 and 488.62 is: 674.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.52 : 931.26 = 488.62 : x
  2. Step 2: Convert to fraction form
    674.52/931.26 = 488.62/x
  3. Step 3: Cross multiply
    674.52x = 931.26 × 488.62
  4. Step 4: Simplify right side
    674.52x = 455,032.26
  5. Step 5: Solve for x
    x = 455,032.26/674.52
  6. Step 6: Final answer
    x = 674.60

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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.