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Finding the Fourth Proportional to 338,959.30, 508,418 and 139,274.56

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Solution

The fourth proportional to 338,959.30, 508,418 and 139,274.56 is: 208,903.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,959.30 : 508,418 = 139,274.56 : x
  2. Step 2: Convert to fraction form
    338,959.30/508,418 = 139,274.56/x
  3. Step 3: Cross multiply
    338,959.30x = 508,418 × 139,274.56
  4. Step 4: Simplify right side
    338,959.30x = 70,809,693,246.08
  5. Step 5: Solve for x
    x = 70,809,693,246.08/338,959.30
  6. Step 6: Final answer
    x = 208,903.23

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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.