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Finding the Fourth Proportional to 438,070.75, 657,222.77 and 138,556.78

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Solution

The fourth proportional to 438,070.75, 657,222.77 and 138,556.78 is: 207,872.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,070.75 : 657,222.77 = 138,556.78 : x
  2. Step 2: Convert to fraction form
    438,070.75/657,222.77 = 138,556.78/x
  3. Step 3: Cross multiply
    438,070.75x = 657,222.77 × 138,556.78
  4. Step 4: Simplify right side
    438,070.75x = 91,062,670,753.88
  5. Step 5: Solve for x
    x = 91,062,670,753.88/438,070.75
  6. Step 6: Final answer
    x = 207,872.06

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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.