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Finding the Fourth Proportional to 648.56, 970.51 and 605.11

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Solution

The fourth proportional to 648.56, 970.51 and 605.11 is: 905.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.56 : 970.51 = 605.11 : x
  2. Step 2: Convert to fraction form
    648.56/970.51 = 605.11/x
  3. Step 3: Cross multiply
    648.56x = 970.51 × 605.11
  4. Step 4: Simplify right side
    648.56x = 587,265.31
  5. Step 5: Solve for x
    x = 587,265.31/648.56
  6. Step 6: Final answer
    x = 905.50

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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.