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Finding the Fourth Proportional to 5,674.38, 7,831.29 and 3,316.38

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Solution

The fourth proportional to 5,674.38, 7,831.29 and 3,316.38 is: 4,576.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,674.38 : 7,831.29 = 3,316.38 : x
  2. Step 2: Convert to fraction form
    5,674.38/7,831.29 = 3,316.38/x
  3. Step 3: Cross multiply
    5,674.38x = 7,831.29 × 3,316.38
  4. Step 4: Simplify right side
    5,674.38x = 25,971,533.53
  5. Step 5: Solve for x
    x = 25,971,533.53/5,674.38
  6. Step 6: Final answer
    x = 4,576.98

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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.