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Finding the Fourth Proportional to 1,167.36, 1,609.56 and 964.86

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Solution

The fourth proportional to 1,167.36, 1,609.56 and 964.86 is: 1,330.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.36 : 1,609.56 = 964.86 : x
  2. Step 2: Convert to fraction form
    1,167.36/1,609.56 = 964.86/x
  3. Step 3: Cross multiply
    1,167.36x = 1,609.56 × 964.86
  4. Step 4: Simplify right side
    1,167.36x = 1,553,000.06
  5. Step 5: Solve for x
    x = 1,553,000.06/1,167.36
  6. Step 6: Final answer
    x = 1,330.35

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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.