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Finding the Fourth Proportional to 965.24, 1,331.40 and 670.66

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Solution

The fourth proportional to 965.24, 1,331.40 and 670.66 is: 925.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.24 : 1,331.40 = 670.66 : x
  2. Step 2: Convert to fraction form
    965.24/1,331.40 = 670.66/x
  3. Step 3: Cross multiply
    965.24x = 1,331.40 × 670.66
  4. Step 4: Simplify right side
    965.24x = 892,916.72
  5. Step 5: Solve for x
    x = 892,916.72/965.24
  6. Step 6: Final answer
    x = 925.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.