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Finding the Third Proportional to 398,865,928.50 and 612,706,902.75

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Solution

The third proportional to 398,865,928.50 and 612,706,902.75 is: 941,192,821.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,865,928.50 : 612,706,902.75 = 612,706,902.75 : x
  2. Step 2: Convert to fraction form
    398,865,928.50/612,706,902.75 = 612,706,902.75/x
  3. Step 3: Cross multiply
    398,865,928.50x = 612,706,902.75 × 612,706,902.75
  4. Step 4: Simplify right side
    398,865,928.50x = 375,409,748,677,497,984
  5. Step 5: Solve for x
    x = 375,409,748,677,497,984/398,865,928.50
  6. Step 6: Final answer
    x = 941,192,821.58

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.