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Finding the Fourth Proportional to 252,652,541.80, 378,978,812.70 and 215,664,248.20

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Solution

The fourth proportional to 252,652,541.80, 378,978,812.70 and 215,664,248.20 is: 323,496,372.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,652,541.80 : 378,978,812.70 = 215,664,248.20 : x
  2. Step 2: Convert to fraction form
    252,652,541.80/378,978,812.70 = 215,664,248.20/x
  3. Step 3: Cross multiply
    252,652,541.80x = 378,978,812.70 × 215,664,248.20
  4. Step 4: Simplify right side
    252,652,541.80x = 81,732,180,724,674,112
  5. Step 5: Solve for x
    x = 81,732,180,724,674,112/252,652,541.80
  6. Step 6: Final answer
    x = 323,496,372.30

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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.