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Finding the Fourth Proportional to 630.88, 946.10 and 214.35

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Solution

The fourth proportional to 630.88, 946.10 and 214.35 is: 321.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.88 : 946.10 = 214.35 : x
  2. Step 2: Convert to fraction form
    630.88/946.10 = 214.35/x
  3. Step 3: Cross multiply
    630.88x = 946.10 × 214.35
  4. Step 4: Simplify right side
    630.88x = 202,796.54
  5. Step 5: Solve for x
    x = 202,796.54/630.88
  6. Step 6: Final answer
    x = 321.45

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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.