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Finding the Fourth Proportional to 831.94, 1,148.01 and 477.87

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Solution

The fourth proportional to 831.94, 1,148.01 and 477.87 is: 659.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.94 : 1,148.01 = 477.87 : x
  2. Step 2: Convert to fraction form
    831.94/1,148.01 = 477.87/x
  3. Step 3: Cross multiply
    831.94x = 1,148.01 × 477.87
  4. Step 4: Simplify right side
    831.94x = 548,599.54
  5. Step 5: Solve for x
    x = 548,599.54/831.94
  6. Step 6: Final answer
    x = 659.42

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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.