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Finding the Fourth Proportional to 489,679.67, 734,269.46 and 287,670.33

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Solution

The fourth proportional to 489,679.67, 734,269.46 and 287,670.33 is: 431,358.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,679.67 : 734,269.46 = 287,670.33 : x
  2. Step 2: Convert to fraction form
    489,679.67/734,269.46 = 287,670.33/x
  3. Step 3: Cross multiply
    489,679.67x = 734,269.46 × 287,670.33
  4. Step 4: Simplify right side
    489,679.67x = 211,227,538,586.30
  5. Step 5: Solve for x
    x = 211,227,538,586.30/489,679.67
  6. Step 6: Final answer
    x = 431,358.60

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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.