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Finding the Fourth Proportional to 259,805.40, 389,708.10 and 159,640.80

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Solution

The fourth proportional to 259,805.40, 389,708.10 and 159,640.80 is: 239,461.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,805.40 : 389,708.10 = 159,640.80 : x
  2. Step 2: Convert to fraction form
    259,805.40/389,708.10 = 159,640.80/x
  3. Step 3: Cross multiply
    259,805.40x = 389,708.10 × 159,640.80
  4. Step 4: Simplify right side
    259,805.40x = 62,213,312,850.48
  5. Step 5: Solve for x
    x = 62,213,312,850.48/259,805.40
  6. Step 6: Final answer
    x = 239,461.20

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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.