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Finding the Fourth Proportional to 259,608.95, 389,411.54 and 139,722.20

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Solution

The fourth proportional to 259,608.95, 389,411.54 and 139,722.20 is: 209,582.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,608.95 : 389,411.54 = 139,722.20 : x
  2. Step 2: Convert to fraction form
    259,608.95/389,411.54 = 139,722.20/x
  3. Step 3: Cross multiply
    259,608.95x = 389,411.54 × 139,722.20
  4. Step 4: Simplify right side
    259,608.95x = 54,409,436,375.58
  5. Step 5: Solve for x
    x = 54,409,436,375.58/259,608.95
  6. Step 6: Final answer
    x = 209,582.28

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1.5x scale

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.