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Finding the Fourth Proportional to 391,220,003.40, 585,554,546.70 and 391,220,003.40

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Solution

The fourth proportional to 391,220,003.40, 585,554,546.70 and 391,220,003.40 is: 585,554,546.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,220,003.40 : 585,554,546.70 = 391,220,003.40 : x
  2. Step 2: Convert to fraction form
    391,220,003.40/585,554,546.70 = 391,220,003.40/x
  3. Step 3: Cross multiply
    391,220,003.40x = 585,554,546.70 × 391,220,003.40
  4. Step 4: Simplify right side
    391,220,003.40x = 229,080,651,750,859,456
  5. Step 5: Solve for x
    x = 229,080,651,750,859,456/391,220,003.40
  6. Step 6: Final answer
    x = 585,554,546.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.