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Finding the Fourth Proportional to 666,628,648.74, 920,266,536.78 and 443,980,851.30

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Solution

The fourth proportional to 666,628,648.74, 920,266,536.78 and 443,980,851.30 is: 612,906,032.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,628,648.74 : 920,266,536.78 = 443,980,851.30 : x
  2. Step 2: Convert to fraction form
    666,628,648.74/920,266,536.78 = 443,980,851.30/x
  3. Step 3: Cross multiply
    666,628,648.74x = 920,266,536.78 × 443,980,851.30
  4. Step 4: Simplify right side
    666,628,648.74x = 408,580,720,422,487,168
  5. Step 5: Solve for x
    x = 408,580,720,422,487,168/666,628,648.74
  6. Step 6: Final answer
    x = 612,906,032.76

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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.