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Finding the Third Proportional to 155.63 and 328.13

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Solution

The third proportional to 155.63 and 328.13 is: 691.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.63 : 328.13 = 328.13 : x
  2. Step 2: Convert to fraction form
    155.63/328.13 = 328.13/x
  3. Step 3: Cross multiply
    155.63x = 328.13 × 328.13
  4. Step 4: Simplify right side
    155.63x = 107,666.02
  5. Step 5: Solve for x
    x = 107,666.02/155.63
  6. Step 6: Final answer
    x = 691.83

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.