Home / 1,172,227,491.12-1,617,677,120.80-643,625,715.36

Finding the Fourth Proportional to 1,172,227,491.12, 1,617,677,120.80 and 643,625,715.36

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Solution

The fourth proportional to 1,172,227,491.12, 1,617,677,120.80 and 643,625,715.36 is: 888,205,234.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172,227,491.12 : 1,617,677,120.80 = 643,625,715.36 : x
  2. Step 2: Convert to fraction form
    1,172,227,491.12/1,617,677,120.80 = 643,625,715.36/x
  3. Step 3: Cross multiply
    1,172,227,491.12x = 1,617,677,120.80 × 643,625,715.36
  4. Step 4: Simplify right side
    1,172,227,491.12x = 1,041,178,594,096,405,120
  5. Step 5: Solve for x
    x = 1,041,178,594,096,405,120/1,172,227,491.12
  6. Step 6: Final answer
    x = 888,205,234.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.