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Finding the Fourth Proportional to 1,294.32, 1,786.15 and 704.86

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Solution

The fourth proportional to 1,294.32, 1,786.15 and 704.86 is: 972.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.32 : 1,786.15 = 704.86 : x
  2. Step 2: Convert to fraction form
    1,294.32/1,786.15 = 704.86/x
  3. Step 3: Cross multiply
    1,294.32x = 1,786.15 × 704.86
  4. Step 4: Simplify right side
    1,294.32x = 1,258,985.69
  5. Step 5: Solve for x
    x = 1,258,985.69/1,294.32
  6. Step 6: Final answer
    x = 972.70

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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.