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Finding the Fourth Proportional to 438,604.40, 657,930.08 and 139,107.72

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Solution

The fourth proportional to 438,604.40, 657,930.08 and 139,107.72 is: 208,669.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,604.40 : 657,930.08 = 139,107.72 : x
  2. Step 2: Convert to fraction form
    438,604.40/657,930.08 = 139,107.72/x
  3. Step 3: Cross multiply
    438,604.40x = 657,930.08 × 139,107.72
  4. Step 4: Simplify right side
    438,604.40x = 91,523,153,348.22
  5. Step 5: Solve for x
    x = 91,523,153,348.22/438,604.40
  6. Step 6: Final answer
    x = 208,669.03

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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.