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Finding the Fourth Proportional to 554.96, 831.72 and 311.70

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Solution

The fourth proportional to 554.96, 831.72 and 311.70 is: 467.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.96 : 831.72 = 311.70 : x
  2. Step 2: Convert to fraction form
    554.96/831.72 = 311.70/x
  3. Step 3: Cross multiply
    554.96x = 831.72 × 311.70
  4. Step 4: Simplify right side
    554.96x = 259,247.12
  5. Step 5: Solve for x
    x = 259,247.12/554.96
  6. Step 6: Final answer
    x = 467.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.