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Finding the Fourth Proportional to 612,781.91, 919,172.94 and 163,504.45

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Solution

The fourth proportional to 612,781.91, 919,172.94 and 163,504.45 is: 245,256.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,781.91 : 919,172.94 = 163,504.45 : x
  2. Step 2: Convert to fraction form
    612,781.91/919,172.94 = 163,504.45/x
  3. Step 3: Cross multiply
    612,781.91x = 919,172.94 × 163,504.45
  4. Step 4: Simplify right side
    612,781.91x = 150,288,864,420.09
  5. Step 5: Solve for x
    x = 150,288,864,420.09/612,781.91
  6. Step 6: Final answer
    x = 245,256.69

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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.