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Finding the Third Proportional to 245,421,828 and 390,703,122

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Solution

The third proportional to 245,421,828 and 390,703,122 is: 621,985,952.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,421,828 : 390,703,122 = 390,703,122 : x
  2. Step 2: Convert to fraction form
    245,421,828/390,703,122 = 390,703,122/x
  3. Step 3: Cross multiply
    245,421,828x = 390,703,122 × 390,703,122
  4. Step 4: Simplify right side
    245,421,828x = 152,648,929,540,546,880
  5. Step 5: Solve for x
    x = 152,648,929,540,546,880/245,421,828
  6. Step 6: Final answer
    x = 621,985,952.86

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.