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Finding the Fourth Proportional to 858.35, 1,183.39 and 740.18

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Solution

The fourth proportional to 858.35, 1,183.39 and 740.18 is: 1,020.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.35 : 1,183.39 = 740.18 : x
  2. Step 2: Convert to fraction form
    858.35/1,183.39 = 740.18/x
  3. Step 3: Cross multiply
    858.35x = 1,183.39 × 740.18
  4. Step 4: Simplify right side
    858.35x = 875,922.72
  5. Step 5: Solve for x
    x = 875,922.72/858.35
  6. Step 6: Final answer
    x = 1,020.47

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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.