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Finding the Fourth Proportional to 259,880.40, 389,820.60 and 159,715.80

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Solution

The fourth proportional to 259,880.40, 389,820.60 and 159,715.80 is: 239,573.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,880.40 : 389,820.60 = 159,715.80 : x
  2. Step 2: Convert to fraction form
    259,880.40/389,820.60 = 159,715.80/x
  3. Step 3: Cross multiply
    259,880.40x = 389,820.60 × 159,715.80
  4. Step 4: Simplify right side
    259,880.40x = 62,260,508,985.48
  5. Step 5: Solve for x
    x = 62,260,508,985.48/259,880.40
  6. Step 6: Final answer
    x = 239,573.70

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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.