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Finding the Third Proportional to 358 and 780.63

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Solution

The third proportional to 358 and 780.63 is: 1,702.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    358 : 780.63 = 780.63 : x
  2. Step 2: Convert to fraction form
    358/780.63 = 780.63/x
  3. Step 3: Cross multiply
    358x = 780.63 × 780.63
  4. Step 4: Simplify right side
    358x = 609,375.39
  5. Step 5: Solve for x
    x = 609,375.39/358
  6. Step 6: Final answer
    x = 1,702.17

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.