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Finding the Fourth Proportional to 259,743.80, 389,615.70 and 171,097.40

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Solution

The fourth proportional to 259,743.80, 389,615.70 and 171,097.40 is: 256,646.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,743.80 : 389,615.70 = 171,097.40 : x
  2. Step 2: Convert to fraction form
    259,743.80/389,615.70 = 171,097.40/x
  3. Step 3: Cross multiply
    259,743.80x = 389,615.70 × 171,097.40
  4. Step 4: Simplify right side
    259,743.80x = 66,662,233,269.18
  5. Step 5: Solve for x
    x = 66,662,233,269.18/259,743.80
  6. Step 6: Final answer
    x = 256,646.10

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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.