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Finding the Fourth Proportional to 612,388.28, 916,617 and 327,366.08

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Solution

The fourth proportional to 612,388.28, 916,617 and 327,366.08 is: 489,998.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,388.28 : 916,617 = 327,366.08 : x
  2. Step 2: Convert to fraction form
    612,388.28/916,617 = 327,366.08/x
  3. Step 3: Cross multiply
    612,388.28x = 916,617 × 327,366.08
  4. Step 4: Simplify right side
    612,388.28x = 300,069,314,151.36
  5. Step 5: Solve for x
    x = 300,069,314,151.36/612,388.28
  6. Step 6: Final answer
    x = 489,998.46

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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.