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Finding the Third Proportional to 178,931,892 and 391,357,607

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Solution

The third proportional to 178,931,892 and 391,357,607 is: 855,972,486.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,931,892 : 391,357,607 = 391,357,607 : x
  2. Step 2: Convert to fraction form
    178,931,892/391,357,607 = 391,357,607/x
  3. Step 3: Cross multiply
    178,931,892x = 391,357,607 × 391,357,607
  4. Step 4: Simplify right side
    178,931,892x = 153,160,776,556,766,464
  5. Step 5: Solve for x
    x = 153,160,776,556,766,464/178,931,892
  6. Step 6: Final answer
    x = 855,972,486.76

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.