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Finding the Fourth Proportional to 612,986.10, 845,907.63 and 354,873.96

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Solution

The fourth proportional to 612,986.10, 845,907.63 and 354,873.96 is: 489,718.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,986.10 : 845,907.63 = 354,873.96 : x
  2. Step 2: Convert to fraction form
    612,986.10/845,907.63 = 354,873.96/x
  3. Step 3: Cross multiply
    612,986.10x = 845,907.63 × 354,873.96
  4. Step 4: Simplify right side
    612,986.10x = 300,190,590,119.62
  5. Step 5: Solve for x
    x = 300,190,590,119.62/612,986.10
  6. Step 6: Final answer
    x = 489,718.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.