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Finding the Fourth Proportional to 647.34, 970.68 and 236.38

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Solution

The fourth proportional to 647.34, 970.68 and 236.38 is: 354.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.34 : 970.68 = 236.38 : x
  2. Step 2: Convert to fraction form
    647.34/970.68 = 236.38/x
  3. Step 3: Cross multiply
    647.34x = 970.68 × 236.38
  4. Step 4: Simplify right side
    647.34x = 229,449.34
  5. Step 5: Solve for x
    x = 229,449.34/647.34
  6. Step 6: Final answer
    x = 354.45

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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.