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Finding the Fourth Proportional to 427,281.18, 640,920.96 and 161,101.41

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Solution

The fourth proportional to 427,281.18, 640,920.96 and 161,101.41 is: 241,651.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,281.18 : 640,920.96 = 161,101.41 : x
  2. Step 2: Convert to fraction form
    427,281.18/640,920.96 = 161,101.41/x
  3. Step 3: Cross multiply
    427,281.18x = 640,920.96 × 161,101.41
  4. Step 4: Simplify right side
    427,281.18x = 103,253,270,354.55
  5. Step 5: Solve for x
    x = 103,253,270,354.55/427,281.18
  6. Step 6: Final answer
    x = 241,651.81

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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.