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Finding the Fourth Proportional to 864,388.40, 1,295,999.40 and 415,324.40

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Solution

The fourth proportional to 864,388.40, 1,295,999.40 and 415,324.40 is: 622,706.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,388.40 : 1,295,999.40 = 415,324.40 : x
  2. Step 2: Convert to fraction form
    864,388.40/1,295,999.40 = 415,324.40/x
  3. Step 3: Cross multiply
    864,388.40x = 1,295,999.40 × 415,324.40
  4. Step 4: Simplify right side
    864,388.40x = 538,260,173,205.36
  5. Step 5: Solve for x
    x = 538,260,173,205.36/864,388.40
  6. Step 6: Final answer
    x = 622,706.38

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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.