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Finding the Fourth Proportional to 612,388.03, 916,616.62 and 327,365.83

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Solution

The fourth proportional to 612,388.03, 916,616.62 and 327,365.83 is: 489,998.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,388.03 : 916,616.62 = 327,365.83 : x
  2. Step 2: Convert to fraction form
    612,388.03/916,616.62 = 327,365.83/x
  3. Step 3: Cross multiply
    612,388.03x = 916,616.62 × 327,365.83
  4. Step 4: Simplify right side
    612,388.03x = 300,068,960,598.10
  5. Step 5: Solve for x
    x = 300,068,960,598.10/612,388.03
  6. Step 6: Final answer
    x = 489,998.08

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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.