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Finding the Fourth Proportional to 398,679,529.20, 598,019,293.80 and 398,679,529.20

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Solution

The fourth proportional to 398,679,529.20, 598,019,293.80 and 398,679,529.20 is: 598,019,293.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,679,529.20 : 598,019,293.80 = 398,679,529.20 : x
  2. Step 2: Convert to fraction form
    398,679,529.20/598,019,293.80 = 398,679,529.20/x
  3. Step 3: Cross multiply
    398,679,529.20x = 598,019,293.80 × 398,679,529.20
  4. Step 4: Simplify right side
    398,679,529.20x = 238,418,050,504,700,448
  5. Step 5: Solve for x
    x = 238,418,050,504,700,448/398,679,529.20
  6. Step 6: Final answer
    x = 598,019,293.80

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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.