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Finding the Third Proportional to 258,678,696 and 390,703,707

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Solution

The third proportional to 258,678,696 and 390,703,707 is: 590,111,938.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,678,696 : 390,703,707 = 390,703,707 : x
  2. Step 2: Convert to fraction form
    258,678,696/390,703,707 = 390,703,707/x
  3. Step 3: Cross multiply
    258,678,696x = 390,703,707 × 390,703,707
  4. Step 4: Simplify right side
    258,678,696x = 152,649,386,663,541,856
  5. Step 5: Solve for x
    x = 152,649,386,663,541,856/258,678,696
  6. Step 6: Final answer
    x = 590,111,938.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.