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Finding the Third Proportional to 417.66 and 915.05

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Solution

The third proportional to 417.66 and 915.05 is: 2,004.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.66 : 915.05 = 915.05 : x
  2. Step 2: Convert to fraction form
    417.66/915.05 = 915.05/x
  3. Step 3: Cross multiply
    417.66x = 915.05 × 915.05
  4. Step 4: Simplify right side
    417.66x = 837,310.78
  5. Step 5: Solve for x
    x = 837,310.78/417.66
  6. Step 6: Final answer
    x = 2,004.78

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.