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Finding the Fourth Proportional to 259,729.80, 389,594.70 and 171,256.20

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Solution

The fourth proportional to 259,729.80, 389,594.70 and 171,256.20 is: 256,884.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,729.80 : 389,594.70 = 171,256.20 : x
  2. Step 2: Convert to fraction form
    259,729.80/389,594.70 = 171,256.20/x
  3. Step 3: Cross multiply
    259,729.80x = 389,594.70 × 171,256.20
  4. Step 4: Simplify right side
    259,729.80x = 66,720,507,862.14
  5. Step 5: Solve for x
    x = 66,720,507,862.14/259,729.80
  6. Step 6: Final answer
    x = 256,884.30

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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.