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Finding the Fourth Proportional to 259,806.80, 390,060.60 and 166,494.80

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Solution

The fourth proportional to 259,806.80, 390,060.60 and 166,494.80 is: 249,966.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,806.80 : 390,060.60 = 166,494.80 : x
  2. Step 2: Convert to fraction form
    259,806.80/390,060.60 = 166,494.80/x
  3. Step 3: Cross multiply
    259,806.80x = 390,060.60 × 166,494.80
  4. Step 4: Simplify right side
    259,806.80x = 64,943,061,584.88
  5. Step 5: Solve for x
    x = 64,943,061,584.88/259,806.80
  6. Step 6: Final answer
    x = 249,966.75

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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.