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Finding the Fourth Proportional to 438,798.74, 658,122.84 and 139,212.54

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Solution

The fourth proportional to 438,798.74, 658,122.84 and 139,212.54 is: 208,794.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,798.74 : 658,122.84 = 139,212.54 : x
  2. Step 2: Convert to fraction form
    438,798.74/658,122.84 = 139,212.54/x
  3. Step 3: Cross multiply
    438,798.74x = 658,122.84 × 139,212.54
  4. Step 4: Simplify right side
    438,798.74x = 91,618,952,188.41
  5. Step 5: Solve for x
    x = 91,618,952,188.41/438,798.74
  6. Step 6: Final answer
    x = 208,794.93

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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.