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Finding the Fourth Proportional to 1,585.53, 2,377.94 and 489.92

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Solution

The fourth proportional to 1,585.53, 2,377.94 and 489.92 is: 734.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.53 : 2,377.94 = 489.92 : x
  2. Step 2: Convert to fraction form
    1,585.53/2,377.94 = 489.92/x
  3. Step 3: Cross multiply
    1,585.53x = 2,377.94 × 489.92
  4. Step 4: Simplify right side
    1,585.53x = 1,164,986.03
  5. Step 5: Solve for x
    x = 1,164,986.03/1,585.53
  6. Step 6: Final answer
    x = 734.76

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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.