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Finding the Fourth Proportional to 737.51, 1,018.91 and 489.65

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Solution

The fourth proportional to 737.51, 1,018.91 and 489.65 is: 676.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.51 : 1,018.91 = 489.65 : x
  2. Step 2: Convert to fraction form
    737.51/1,018.91 = 489.65/x
  3. Step 3: Cross multiply
    737.51x = 1,018.91 × 489.65
  4. Step 4: Simplify right side
    737.51x = 498,905.41
  5. Step 5: Solve for x
    x = 498,905.41/737.51
  6. Step 6: Final answer
    x = 676.48

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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.