Home / 665,617,891.05-996,484,080.69-388,419,665.13

Finding the Fourth Proportional to 665,617,891.05, 996,484,080.69 and 388,419,665.13

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Solution

The fourth proportional to 665,617,891.05, 996,484,080.69 and 388,419,665.13 is: 581,495,807.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,617,891.05 : 996,484,080.69 = 388,419,665.13 : x
  2. Step 2: Convert to fraction form
    665,617,891.05/996,484,080.69 = 388,419,665.13/x
  3. Step 3: Cross multiply
    665,617,891.05x = 996,484,080.69 × 388,419,665.13
  4. Step 4: Simplify right side
    665,617,891.05x = 387,054,012,928,985,728
  5. Step 5: Solve for x
    x = 387,054,012,928,985,728/665,617,891.05
  6. Step 6: Final answer
    x = 581,495,807.33

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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.