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Finding the Fourth Proportional to 430,071.20, 644,329.20 and 367,863.20

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Solution

The fourth proportional to 430,071.20, 644,329.20 and 367,863.20 is: 551,129.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,071.20 : 644,329.20 = 367,863.20 : x
  2. Step 2: Convert to fraction form
    430,071.20/644,329.20 = 367,863.20/x
  3. Step 3: Cross multiply
    430,071.20x = 644,329.20 × 367,863.20
  4. Step 4: Simplify right side
    430,071.20x = 237,025,001,365.44
  5. Step 5: Solve for x
    x = 237,025,001,365.44/430,071.20
  6. Step 6: Final answer
    x = 551,129.68

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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.