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Finding the Fourth Proportional to 290,421.20, 435,644.60 and 164,059.60

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Solution

The fourth proportional to 290,421.20, 435,644.60 and 164,059.60 is: 246,096.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,421.20 : 435,644.60 = 164,059.60 : x
  2. Step 2: Convert to fraction form
    290,421.20/435,644.60 = 164,059.60/x
  3. Step 3: Cross multiply
    290,421.20x = 435,644.60 × 164,059.60
  4. Step 4: Simplify right side
    290,421.20x = 71,471,678,818.16
  5. Step 5: Solve for x
    x = 71,471,678,818.16/290,421.20
  6. Step 6: Final answer
    x = 246,096.63

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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.