Home / 512,653,989.12-707,576,316.48-311,668,156.61

Finding the Fourth Proportional to 512,653,989.12, 707,576,316.48 and 311,668,156.61

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Solution

The fourth proportional to 512,653,989.12, 707,576,316.48 and 311,668,156.61 is: 430,171,247.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,653,989.12 : 707,576,316.48 = 311,668,156.61 : x
  2. Step 2: Convert to fraction form
    512,653,989.12/707,576,316.48 = 311,668,156.61/x
  3. Step 3: Cross multiply
    512,653,989.12x = 707,576,316.48 × 311,668,156.61
  4. Step 4: Simplify right side
    512,653,989.12x = 220,529,006,214,677,696
  5. Step 5: Solve for x
    x = 220,529,006,214,677,696/512,653,989.12
  6. Step 6: Final answer
    x = 430,171,247.85

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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.