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Finding the Fourth Proportional to 355,197.80, 531,921.90 and 167,990.60

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Solution

The fourth proportional to 355,197.80, 531,921.90 and 167,990.60 is: 251,572.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,197.80 : 531,921.90 = 167,990.60 : x
  2. Step 2: Convert to fraction form
    355,197.80/531,921.90 = 167,990.60/x
  3. Step 3: Cross multiply
    355,197.80x = 531,921.90 × 167,990.60
  4. Step 4: Simplify right side
    355,197.80x = 89,357,879,134.14
  5. Step 5: Solve for x
    x = 89,357,879,134.14/355,197.80
  6. Step 6: Final answer
    x = 251,572.16

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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.