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Finding the Fourth Proportional to 955.34, 1,317.92 and 623.64

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Solution

The fourth proportional to 955.34, 1,317.92 and 623.64 is: 860.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.34 : 1,317.92 = 623.64 : x
  2. Step 2: Convert to fraction form
    955.34/1,317.92 = 623.64/x
  3. Step 3: Cross multiply
    955.34x = 1,317.92 × 623.64
  4. Step 4: Simplify right side
    955.34x = 821,907.63
  5. Step 5: Solve for x
    x = 821,907.63/955.34
  6. Step 6: Final answer
    x = 860.33

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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.