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Finding the Fourth Proportional to 1,269.37, 1,904.04 and 489.71

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Solution

The fourth proportional to 1,269.37, 1,904.04 and 489.71 is: 734.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.37 : 1,904.04 = 489.71 : x
  2. Step 2: Convert to fraction form
    1,269.37/1,904.04 = 489.71/x
  3. Step 3: Cross multiply
    1,269.37x = 1,904.04 × 489.71
  4. Step 4: Simplify right side
    1,269.37x = 932,427.43
  5. Step 5: Solve for x
    x = 932,427.43/1,269.37
  6. Step 6: Final answer
    x = 734.56

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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.