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Finding the Fourth Proportional to 1,267.82, 1,901.61 and 859.58

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Solution

The fourth proportional to 1,267.82, 1,901.61 and 859.58 is: 1,289.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.82 : 1,901.61 = 859.58 : x
  2. Step 2: Convert to fraction form
    1,267.82/1,901.61 = 859.58/x
  3. Step 3: Cross multiply
    1,267.82x = 1,901.61 × 859.58
  4. Step 4: Simplify right side
    1,267.82x = 1,634,585.92
  5. Step 5: Solve for x
    x = 1,634,585.92/1,267.82
  6. Step 6: Final answer
    x = 1,289.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.