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Finding the Fourth Proportional to 221,980,512.30, 311,452,961.70 and 221,980,512.30

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Solution

The fourth proportional to 221,980,512.30, 311,452,961.70 and 221,980,512.30 is: 311,452,961.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,980,512.30 : 311,452,961.70 = 221,980,512.30 : x
  2. Step 2: Convert to fraction form
    221,980,512.30/311,452,961.70 = 221,980,512.30/x
  3. Step 3: Cross multiply
    221,980,512.30x = 311,452,961.70 × 221,980,512.30
  4. Step 4: Simplify right side
    221,980,512.30x = 69,136,487,995,518,280
  5. Step 5: Solve for x
    x = 69,136,487,995,518,280/221,980,512.30
  6. Step 6: Final answer
    x = 311,452,961.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.