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Finding the Third Proportional to 245,422,220 and 390,703,664

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Solution

The third proportional to 245,422,220 and 390,703,664 is: 621,986,685.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,422,220 : 390,703,664 = 390,703,664 : x
  2. Step 2: Convert to fraction form
    245,422,220/390,703,664 = 390,703,664/x
  3. Step 3: Cross multiply
    245,422,220x = 390,703,664 × 390,703,664
  4. Step 4: Simplify right side
    245,422,220x = 152,649,353,063,024,896
  5. Step 5: Solve for x
    x = 152,649,353,063,024,896/245,422,220
  6. Step 6: Final answer
    x = 621,986,685.08

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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.