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Finding the Fourth Proportional to 377.46, 521.37 and 311.31

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Solution

The fourth proportional to 377.46, 521.37 and 311.31 is: 430.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.46 : 521.37 = 311.31 : x
  2. Step 2: Convert to fraction form
    377.46/521.37 = 311.31/x
  3. Step 3: Cross multiply
    377.46x = 521.37 × 311.31
  4. Step 4: Simplify right side
    377.46x = 162,307.69
  5. Step 5: Solve for x
    x = 162,307.69/377.46
  6. Step 6: Final answer
    x = 430.00

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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.