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Finding the Fourth Proportional to 646.93, 970.44 and 214.39

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Solution

The fourth proportional to 646.93, 970.44 and 214.39 is: 321.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.93 : 970.44 = 214.39 : x
  2. Step 2: Convert to fraction form
    646.93/970.44 = 214.39/x
  3. Step 3: Cross multiply
    646.93x = 970.44 × 214.39
  4. Step 4: Simplify right side
    646.93x = 208,052.63
  5. Step 5: Solve for x
    x = 208,052.63/646.93
  6. Step 6: Final answer
    x = 321.60

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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.