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Finding the Fourth Proportional to 438,878.56, 658,250.43 and 139,320.22

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Solution

The fourth proportional to 438,878.56, 658,250.43 and 139,320.22 is: 208,958.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,878.56 : 658,250.43 = 139,320.22 : x
  2. Step 2: Convert to fraction form
    438,878.56/658,250.43 = 139,320.22/x
  3. Step 3: Cross multiply
    438,878.56x = 658,250.43 × 139,320.22
  4. Step 4: Simplify right side
    438,878.56x = 91,707,594,722.69
  5. Step 5: Solve for x
    x = 91,707,594,722.69/438,878.56
  6. Step 6: Final answer
    x = 208,958.93

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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.