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Finding the Fourth Proportional to 966.39, 1,333.89 and 612.38

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Solution

The fourth proportional to 966.39, 1,333.89 and 612.38 is: 845.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.39 : 1,333.89 = 612.38 : x
  2. Step 2: Convert to fraction form
    966.39/1,333.89 = 612.38/x
  3. Step 3: Cross multiply
    966.39x = 1,333.89 × 612.38
  4. Step 4: Simplify right side
    966.39x = 816,840.89
  5. Step 5: Solve for x
    x = 816,840.89/966.39
  6. Step 6: Final answer
    x = 845.25

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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.