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Finding the Fourth Proportional to 955.46, 1,318.78 and 623.34

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Solution

The fourth proportional to 955.46, 1,318.78 and 623.34 is: 860.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.46 : 1,318.78 = 623.34 : x
  2. Step 2: Convert to fraction form
    955.46/1,318.78 = 623.34/x
  3. Step 3: Cross multiply
    955.46x = 1,318.78 × 623.34
  4. Step 4: Simplify right side
    955.46x = 822,048.33
  5. Step 5: Solve for x
    x = 822,048.33/955.46
  6. Step 6: Final answer
    x = 860.37

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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.