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Finding the Fourth Proportional to 1,293.58, 1,785.15 and 704.12

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Solution

The fourth proportional to 1,293.58, 1,785.15 and 704.12 is: 971.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.58 : 1,785.15 = 704.12 : x
  2. Step 2: Convert to fraction form
    1,293.58/1,785.15 = 704.12/x
  3. Step 3: Cross multiply
    1,293.58x = 1,785.15 × 704.12
  4. Step 4: Simplify right side
    1,293.58x = 1,256,964.28
  5. Step 5: Solve for x
    x = 1,256,964.28/1,293.58
  6. Step 6: Final answer
    x = 971.69

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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.