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Finding the Fourth Proportional to 395,420.72, 545,683.19 and 214,132.68

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Solution

The fourth proportional to 395,420.72, 545,683.19 and 214,132.68 is: 295,504.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,420.72 : 545,683.19 = 214,132.68 : x
  2. Step 2: Convert to fraction form
    395,420.72/545,683.19 = 214,132.68/x
  3. Step 3: Cross multiply
    395,420.72x = 545,683.19 × 214,132.68
  4. Step 4: Simplify right side
    395,420.72x = 116,848,602,834.99
  5. Step 5: Solve for x
    x = 116,848,602,834.99/395,420.72
  6. Step 6: Final answer
    x = 295,504.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.