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Finding the Fourth Proportional to 646.78, 970.26 and 262

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Solution

The fourth proportional to 646.78, 970.26 and 262 is: 393.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.78 : 970.26 = 262 : x
  2. Step 2: Convert to fraction form
    646.78/970.26 = 262/x
  3. Step 3: Cross multiply
    646.78x = 970.26 × 262
  4. Step 4: Simplify right side
    646.78x = 254,208.12
  5. Step 5: Solve for x
    x = 254,208.12/646.78
  6. Step 6: Final answer
    x = 393.04

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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.