Home / 512,840,721.72-707,447,264.64-311,959,012.62

Finding the Fourth Proportional to 512,840,721.72, 707,447,264.64 and 311,959,012.62

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Solution

The fourth proportional to 512,840,721.72, 707,447,264.64 and 311,959,012.62 is: 430,337,414.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,840,721.72 : 707,447,264.64 = 311,959,012.62 : x
  2. Step 2: Convert to fraction form
    512,840,721.72/707,447,264.64 = 311,959,012.62/x
  3. Step 3: Cross multiply
    512,840,721.72x = 707,447,264.64 × 311,959,012.62
  4. Step 4: Simplify right side
    512,840,721.72x = 220,694,550,157,814,240
  5. Step 5: Solve for x
    x = 220,694,550,157,814,240/512,840,721.72
  6. Step 6: Final answer
    x = 430,337,414.35

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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.