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Finding the Fourth Proportional to 259,711.20, 389,566.80 and 171,064.80

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Solution

The fourth proportional to 259,711.20, 389,566.80 and 171,064.80 is: 256,597.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,711.20 : 389,566.80 = 171,064.80 : x
  2. Step 2: Convert to fraction form
    259,711.20/389,566.80 = 171,064.80/x
  3. Step 3: Cross multiply
    259,711.20x = 389,566.80 × 171,064.80
  4. Step 4: Simplify right side
    259,711.20x = 66,641,166,728.64
  5. Step 5: Solve for x
    x = 66,641,166,728.64/259,711.20
  6. Step 6: Final answer
    x = 256,597.20

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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.