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Finding the Third Proportional to 388.13 and 915.94

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Solution

The third proportional to 388.13 and 915.94 is: 2,161.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.13 : 915.94 = 915.94 : x
  2. Step 2: Convert to fraction form
    388.13/915.94 = 915.94/x
  3. Step 3: Cross multiply
    388.13x = 915.94 × 915.94
  4. Step 4: Simplify right side
    388.13x = 838,941.50
  5. Step 5: Solve for x
    x = 838,941.50/388.13
  6. Step 6: Final answer
    x = 2,161.52

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.