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Finding the Fourth Proportional to 279,935,999.60, 419,903,999.40 and 207,376,588.40

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Solution

The fourth proportional to 279,935,999.60, 419,903,999.40 and 207,376,588.40 is: 311,064,882.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,935,999.60 : 419,903,999.40 = 207,376,588.40 : x
  2. Step 2: Convert to fraction form
    279,935,999.60/419,903,999.40 = 207,376,588.40/x
  3. Step 3: Cross multiply
    279,935,999.60x = 419,903,999.40 × 207,376,588.40
  4. Step 4: Simplify right side
    279,935,999.60x = 87,078,258,851,087,648
  5. Step 5: Solve for x
    x = 87,078,258,851,087,648/279,935,999.60
  6. Step 6: Final answer
    x = 311,064,882.60

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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.