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Finding the Fourth Proportional to 1,099.86, 1,640.97 and 1,017.86

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Solution

The fourth proportional to 1,099.86, 1,640.97 and 1,017.86 is: 1,518.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.86 : 1,640.97 = 1,017.86 : x
  2. Step 2: Convert to fraction form
    1,099.86/1,640.97 = 1,017.86/x
  3. Step 3: Cross multiply
    1,099.86x = 1,640.97 × 1,017.86
  4. Step 4: Simplify right side
    1,099.86x = 1,670,269.52
  5. Step 5: Solve for x
    x = 1,670,269.52/1,099.86
  6. Step 6: Final answer
    x = 1,518.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.