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Finding the Third Proportional to 187,908,516 and 287,478,990

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Solution

The third proportional to 187,908,516 and 287,478,990 is: 439,810,666.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,908,516 : 287,478,990 = 287,478,990 : x
  2. Step 2: Convert to fraction form
    187,908,516/287,478,990 = 287,478,990/x
  3. Step 3: Cross multiply
    187,908,516x = 287,478,990 × 287,478,990
  4. Step 4: Simplify right side
    187,908,516x = 82,644,169,691,420,096
  5. Step 5: Solve for x
    x = 82,644,169,691,420,096/187,908,516
  6. Step 6: Final answer
    x = 439,810,666.65

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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.