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Finding the Fourth Proportional to 955.61, 1,318.97 and 623.46

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Solution

The fourth proportional to 955.61, 1,318.97 and 623.46 is: 860.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.61 : 1,318.97 = 623.46 : x
  2. Step 2: Convert to fraction form
    955.61/1,318.97 = 623.46/x
  3. Step 3: Cross multiply
    955.61x = 1,318.97 × 623.46
  4. Step 4: Simplify right side
    955.61x = 822,325.04
  5. Step 5: Solve for x
    x = 822,325.04/955.61
  6. Step 6: Final answer
    x = 860.52

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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.