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Finding the Third Proportional to 153,515 and 330,358

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Solution

The third proportional to 153,515 and 330,358 is: 710,916.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,515 : 330,358 = 330,358 : x
  2. Step 2: Convert to fraction form
    153,515/330,358 = 330,358/x
  3. Step 3: Cross multiply
    153,515x = 330,358 × 330,358
  4. Step 4: Simplify right side
    153,515x = 109,136,408,164
  5. Step 5: Solve for x
    x = 109,136,408,164/153,515
  6. Step 6: Final answer
    x = 710,916.90

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.