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Finding the Fourth Proportional to 439,207.87, 658,804.88 and 139,684.12

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Solution

The fourth proportional to 439,207.87, 658,804.88 and 139,684.12 is: 209,523.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,207.87 : 658,804.88 = 139,684.12 : x
  2. Step 2: Convert to fraction form
    439,207.87/658,804.88 = 139,684.12/x
  3. Step 3: Cross multiply
    439,207.87x = 658,804.88 × 139,684.12
  4. Step 4: Simplify right side
    439,207.87x = 92,024,579,216.09
  5. Step 5: Solve for x
    x = 92,024,579,216.09/439,207.87
  6. Step 6: Final answer
    x = 209,523.98

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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.