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Finding the Fourth Proportional to 397.63, 546.47 and 310.15

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Solution

The fourth proportional to 397.63, 546.47 and 310.15 is: 426.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.63 : 546.47 = 310.15 : x
  2. Step 2: Convert to fraction form
    397.63/546.47 = 310.15/x
  3. Step 3: Cross multiply
    397.63x = 546.47 × 310.15
  4. Step 4: Simplify right side
    397.63x = 169,487.67
  5. Step 5: Solve for x
    x = 169,487.67/397.63
  6. Step 6: Final answer
    x = 426.24

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.