Home / 512,489,400.78-769,960,479.64-328,617,124.28

Finding the Fourth Proportional to 512,489,400.78, 769,960,479.64 and 328,617,124.28

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Solution

The fourth proportional to 512,489,400.78, 769,960,479.64 and 328,617,124.28 is: 493,712,061.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,489,400.78 : 769,960,479.64 = 328,617,124.28 : x
  2. Step 2: Convert to fraction form
    512,489,400.78/769,960,479.64 = 328,617,124.28/x
  3. Step 3: Cross multiply
    512,489,400.78x = 769,960,479.64 × 328,617,124.28
  4. Step 4: Simplify right side
    512,489,400.78x = 253,022,198,628,546,272
  5. Step 5: Solve for x
    x = 253,022,198,628,546,272/512,489,400.78
  6. Step 6: Final answer
    x = 493,712,061.64

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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.