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Finding the Fourth Proportional to 646.69, 970 and 235.75

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Solution

The fourth proportional to 646.69, 970 and 235.75 is: 353.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.69 : 970 = 235.75 : x
  2. Step 2: Convert to fraction form
    646.69/970 = 235.75/x
  3. Step 3: Cross multiply
    646.69x = 970 × 235.75
  4. Step 4: Simplify right side
    646.69x = 228,677.50
  5. Step 5: Solve for x
    x = 228,677.50/646.69
  6. Step 6: Final answer
    x = 353.61

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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.