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Finding the Third Proportional to 438.18 and 930.47

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Solution

The third proportional to 438.18 and 930.47 is: 1,975.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.18 : 930.47 = 930.47 : x
  2. Step 2: Convert to fraction form
    438.18/930.47 = 930.47/x
  3. Step 3: Cross multiply
    438.18x = 930.47 × 930.47
  4. Step 4: Simplify right side
    438.18x = 865,777.55
  5. Step 5: Solve for x
    x = 865,777.55/438.18
  6. Step 6: Final answer
    x = 1,975.84

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.