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Finding the Fourth Proportional to 831.08, 1,146.84 and 481.70

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Solution

The fourth proportional to 831.08, 1,146.84 and 481.70 is: 664.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.08 : 1,146.84 = 481.70 : x
  2. Step 2: Convert to fraction form
    831.08/1,146.84 = 481.70/x
  3. Step 3: Cross multiply
    831.08x = 1,146.84 × 481.70
  4. Step 4: Simplify right side
    831.08x = 552,432.83
  5. Step 5: Solve for x
    x = 552,432.83/831.08
  6. Step 6: Final answer
    x = 664.72

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1.5x scale

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.