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Finding the Third Proportional to 212,156,515 and 316,928,173

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Solution

The third proportional to 212,156,515 and 316,928,173 is: 473,440,407.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,156,515 : 316,928,173 = 316,928,173 : x
  2. Step 2: Convert to fraction form
    212,156,515/316,928,173 = 316,928,173/x
  3. Step 3: Cross multiply
    212,156,515x = 316,928,173 × 316,928,173
  4. Step 4: Simplify right side
    212,156,515x = 100,443,466,841,117,936
  5. Step 5: Solve for x
    x = 100,443,466,841,117,936/212,156,515
  6. Step 6: Final answer
    x = 473,440,407.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.