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Finding the Fourth Proportional to 952.45, 1,314.81 and 621.09

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Solution

The fourth proportional to 952.45, 1,314.81 and 621.09 is: 857.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    952.45 : 1,314.81 = 621.09 : x
  2. Step 2: Convert to fraction form
    952.45/1,314.81 = 621.09/x
  3. Step 3: Cross multiply
    952.45x = 1,314.81 × 621.09
  4. Step 4: Simplify right side
    952.45x = 816,615.34
  5. Step 5: Solve for x
    x = 816,615.34/952.45
  6. Step 6: Final answer
    x = 857.39

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1.5x scale

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.