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Finding the Fourth Proportional to 630.37, 946.34 and 425.85

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Solution

The fourth proportional to 630.37, 946.34 and 425.85 is: 639.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.37 : 946.34 = 425.85 : x
  2. Step 2: Convert to fraction form
    630.37/946.34 = 425.85/x
  3. Step 3: Cross multiply
    630.37x = 946.34 × 425.85
  4. Step 4: Simplify right side
    630.37x = 402,998.89
  5. Step 5: Solve for x
    x = 402,998.89/630.37
  6. Step 6: Final answer
    x = 639.31

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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.