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Finding the Fourth Proportional to 639,754.36, 959,632.76 and 166,438.96

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Solution

The fourth proportional to 639,754.36, 959,632.76 and 166,438.96 is: 249,658.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,754.36 : 959,632.76 = 166,438.96 : x
  2. Step 2: Convert to fraction form
    639,754.36/959,632.76 = 166,438.96/x
  3. Step 3: Cross multiply
    639,754.36x = 959,632.76 × 166,438.96
  4. Step 4: Simplify right side
    639,754.36x = 159,720,278,556.33
  5. Step 5: Solve for x
    x = 159,720,278,556.33/639,754.36
  6. Step 6: Final answer
    x = 249,658.76

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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.