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Finding the Fourth Proportional to 956.11, 1,318.93 and 789.35

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Solution

The fourth proportional to 956.11, 1,318.93 and 789.35 is: 1,088.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.11 : 1,318.93 = 789.35 : x
  2. Step 2: Convert to fraction form
    956.11/1,318.93 = 789.35/x
  3. Step 3: Cross multiply
    956.11x = 1,318.93 × 789.35
  4. Step 4: Simplify right side
    956.11x = 1,041,097.40
  5. Step 5: Solve for x
    x = 1,041,097.40/956.11
  6. Step 6: Final answer
    x = 1,088.89

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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.