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Finding the Fourth Proportional to 665,617,892.05, 996,484,082.19 and 388,419,666.13

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Solution

The fourth proportional to 665,617,892.05, 996,484,082.19 and 388,419,666.13 is: 581,495,808.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,617,892.05 : 996,484,082.19 = 388,419,666.13 : x
  2. Step 2: Convert to fraction form
    665,617,892.05/996,484,082.19 = 388,419,666.13/x
  3. Step 3: Cross multiply
    665,617,892.05x = 996,484,082.19 × 388,419,666.13
  4. Step 4: Simplify right side
    665,617,892.05x = 387,054,014,508,099,328
  5. Step 5: Solve for x
    x = 387,054,014,508,099,328/665,617,892.05
  6. Step 6: Final answer
    x = 581,495,808.83

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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.