Home / 640,905.40-961,285.20-167,638.60

Finding the Fourth Proportional to 640,905.40, 961,285.20 and 167,638.60

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Solution

The fourth proportional to 640,905.40, 961,285.20 and 167,638.60 is: 251,438.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,905.40 : 961,285.20 = 167,638.60 : x
  2. Step 2: Convert to fraction form
    640,905.40/961,285.20 = 167,638.60/x
  3. Step 3: Cross multiply
    640,905.40x = 961,285.20 × 167,638.60
  4. Step 4: Simplify right side
    640,905.40x = 161,148,505,128.72
  5. Step 5: Solve for x
    x = 161,148,505,128.72/640,905.40
  6. Step 6: Final answer
    x = 251,438.83

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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.