Home / 318,976,640-440,187,940.32-172,298,925.44

Finding the Fourth Proportional to 318,976,640, 440,187,940.32 and 172,298,925.44

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Solution

The fourth proportional to 318,976,640, 440,187,940.32 and 172,298,925.44 is: 237,772,612.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,976,640 : 440,187,940.32 = 172,298,925.44 : x
  2. Step 2: Convert to fraction form
    318,976,640/440,187,940.32 = 172,298,925.44/x
  3. Step 3: Cross multiply
    318,976,640x = 440,187,940.32 × 172,298,925.44
  4. Step 4: Simplify right side
    318,976,640x = 75,843,909,108,782,848
  5. Step 5: Solve for x
    x = 75,843,909,108,782,848/318,976,640
  6. Step 6: Final answer
    x = 237,772,612.78

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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.