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Finding the Fourth Proportional to 259,772.80, 390,009.60 and 166,460.80

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Solution

The fourth proportional to 259,772.80, 390,009.60 and 166,460.80 is: 249,915.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,772.80 : 390,009.60 = 166,460.80 : x
  2. Step 2: Convert to fraction form
    259,772.80/390,009.60 = 166,460.80/x
  3. Step 3: Cross multiply
    259,772.80x = 390,009.60 × 166,460.80
  4. Step 4: Simplify right side
    259,772.80x = 64,921,310,023.68
  5. Step 5: Solve for x
    x = 64,921,310,023.68/259,772.80
  6. Step 6: Final answer
    x = 249,915.73

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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.