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Finding the Fourth Proportional to 265,737,863.70, 398,606,795.55 and 143,293,857.30

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Solution

The fourth proportional to 265,737,863.70, 398,606,795.55 and 143,293,857.30 is: 214,940,785.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,737,863.70 : 398,606,795.55 = 143,293,857.30 : x
  2. Step 2: Convert to fraction form
    265,737,863.70/398,606,795.55 = 143,293,857.30/x
  3. Step 3: Cross multiply
    265,737,863.70x = 398,606,795.55 × 143,293,857.30
  4. Step 4: Simplify right side
    265,737,863.70x = 57,117,905,280,351,984
  5. Step 5: Solve for x
    x = 57,117,905,280,351,984/265,737,863.70
  6. Step 6: Final answer
    x = 214,940,785.95

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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.