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Finding the Fourth Proportional to 489,680.67, 734,270.96 and 287,671.33

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Solution

The fourth proportional to 489,680.67, 734,270.96 and 287,671.33 is: 431,360.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,680.67 : 734,270.96 = 287,671.33 : x
  2. Step 2: Convert to fraction form
    489,680.67/734,270.96 = 287,671.33/x
  3. Step 3: Cross multiply
    489,680.67x = 734,270.96 × 287,671.33
  4. Step 4: Simplify right side
    489,680.67x = 211,228,703,643.58
  5. Step 5: Solve for x
    x = 211,228,703,643.58/489,680.67
  6. Step 6: Final answer
    x = 431,360.10

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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.