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Finding the Fourth Proportional to 398,697,172.20, 598,045,758.30 and 398,697,172.20

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Solution

The fourth proportional to 398,697,172.20, 598,045,758.30 and 398,697,172.20 is: 598,045,758.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,697,172.20 : 598,045,758.30 = 398,697,172.20 : x
  2. Step 2: Convert to fraction form
    398,697,172.20/598,045,758.30 = 398,697,172.20/x
  3. Step 3: Cross multiply
    398,697,172.20x = 598,045,758.30 × 398,697,172.20
  4. Step 4: Simplify right side
    398,697,172.20x = 238,439,152,680,414,656
  5. Step 5: Solve for x
    x = 238,439,152,680,414,656/398,697,172.20
  6. Step 6: Final answer
    x = 598,045,758.30

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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.