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Finding the Third Proportional to 187,908,508 and 287,478,978

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Solution

The third proportional to 187,908,508 and 287,478,978 is: 439,810,648.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,908,508 : 287,478,978 = 287,478,978 : x
  2. Step 2: Convert to fraction form
    187,908,508/287,478,978 = 287,478,978/x
  3. Step 3: Cross multiply
    187,908,508x = 287,478,978 × 287,478,978
  4. Step 4: Simplify right side
    187,908,508x = 82,644,162,791,924,480
  5. Step 5: Solve for x
    x = 82,644,162,791,924,480/187,908,508
  6. Step 6: Final answer
    x = 439,810,648.66

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.