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Finding the Fourth Proportional to 898.04, 1,231.57 and 860.63

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Solution

The fourth proportional to 898.04, 1,231.57 and 860.63 is: 1,180.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.04 : 1,231.57 = 860.63 : x
  2. Step 2: Convert to fraction form
    898.04/1,231.57 = 860.63/x
  3. Step 3: Cross multiply
    898.04x = 1,231.57 × 860.63
  4. Step 4: Simplify right side
    898.04x = 1,059,917.78
  5. Step 5: Solve for x
    x = 1,059,917.78/898.04
  6. Step 6: Final answer
    x = 1,180.25

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.