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Finding the Fourth Proportional to 438,343.90, 657,029.85 and 172,015.90

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Solution

The fourth proportional to 438,343.90, 657,029.85 and 172,015.90 is: 257,833.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,343.90 : 657,029.85 = 172,015.90 : x
  2. Step 2: Convert to fraction form
    438,343.90/657,029.85 = 172,015.90/x
  3. Step 3: Cross multiply
    438,343.90x = 657,029.85 × 172,015.90
  4. Step 4: Simplify right side
    438,343.90x = 113,019,580,974.62
  5. Step 5: Solve for x
    x = 113,019,580,974.62/438,343.90
  6. Step 6: Final answer
    x = 257,833.13

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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.