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Finding the Fourth Proportional to 265,447,611.70, 398,171,417.55 and 220,097,979.70

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Solution

The fourth proportional to 265,447,611.70, 398,171,417.55 and 220,097,979.70 is: 330,146,969.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,447,611.70 : 398,171,417.55 = 220,097,979.70 : x
  2. Step 2: Convert to fraction form
    265,447,611.70/398,171,417.55 = 220,097,979.70/x
  3. Step 3: Cross multiply
    265,447,611.70x = 398,171,417.55 × 220,097,979.70
  4. Step 4: Simplify right side
    265,447,611.70x = 87,636,724,577,040,128
  5. Step 5: Solve for x
    x = 87,636,724,577,040,128/265,447,611.70
  6. Step 6: Final answer
    x = 330,146,969.55

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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.