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Finding the Fourth Proportional to 439,208.60, 658,806 and 139,684.88

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Solution

The fourth proportional to 439,208.60, 658,806 and 139,684.88 is: 209,525.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,208.60 : 658,806 = 139,684.88 : x
  2. Step 2: Convert to fraction form
    439,208.60/658,806 = 139,684.88/x
  3. Step 3: Cross multiply
    439,208.60x = 658,806 × 139,684.88
  4. Step 4: Simplify right side
    439,208.60x = 92,025,237,053.28
  5. Step 5: Solve for x
    x = 92,025,237,053.28/439,208.60
  6. Step 6: Final answer
    x = 209,525.13

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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.