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Finding the Fourth Proportional to 438,668.54, 658,026.21 and 139,173.08

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Solution

The fourth proportional to 438,668.54, 658,026.21 and 139,173.08 is: 208,767.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,668.54 : 658,026.21 = 139,173.08 : x
  2. Step 2: Convert to fraction form
    438,668.54/658,026.21 = 139,173.08/x
  3. Step 3: Cross multiply
    438,668.54x = 658,026.21 × 139,173.08
  4. Step 4: Simplify right side
    438,668.54x = 91,579,534,366.43
  5. Step 5: Solve for x
    x = 91,579,534,366.43/438,668.54
  6. Step 6: Final answer
    x = 208,767.04

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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.