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Finding the Fourth Proportional to 630, 944.69 and 219

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Solution

The fourth proportional to 630, 944.69 and 219 is: 328.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    630 : 944.69 = 219 : x
  2. Step 2: Convert to fraction form
    630/944.69 = 219/x
  3. Step 3: Cross multiply
    630x = 944.69 × 219
  4. Step 4: Simplify right side
    630x = 206,886.02
  5. Step 5: Solve for x
    x = 206,886.02/630
  6. Step 6: Final answer
    x = 328.39

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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.