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Finding the Fourth Proportional to 966.86, 1,333.70 and 612.12

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Solution

The fourth proportional to 966.86, 1,333.70 and 612.12 is: 844.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.86 : 1,333.70 = 612.12 : x
  2. Step 2: Convert to fraction form
    966.86/1,333.70 = 612.12/x
  3. Step 3: Cross multiply
    966.86x = 1,333.70 × 612.12
  4. Step 4: Simplify right side
    966.86x = 816,384.44
  5. Step 5: Solve for x
    x = 816,384.44/966.86
  6. Step 6: Final answer
    x = 844.37

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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.