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Finding the Fourth Proportional to 259,406.52, 389,121.70 and 79,479.06

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Solution

The fourth proportional to 259,406.52, 389,121.70 and 79,479.06 is: 119,222.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,406.52 : 389,121.70 = 79,479.06 : x
  2. Step 2: Convert to fraction form
    259,406.52/389,121.70 = 79,479.06/x
  3. Step 3: Cross multiply
    259,406.52x = 389,121.70 × 79,479.06
  4. Step 4: Simplify right side
    259,406.52x = 30,927,026,941.60
  5. Step 5: Solve for x
    x = 30,927,026,941.60/259,406.52
  6. Step 6: Final answer
    x = 119,222.24

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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.