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Finding the Fourth Proportional to 1,113.94, 1,670.81 and 873.37

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Solution

The fourth proportional to 1,113.94, 1,670.81 and 873.37 is: 1,309.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.94 : 1,670.81 = 873.37 : x
  2. Step 2: Convert to fraction form
    1,113.94/1,670.81 = 873.37/x
  3. Step 3: Cross multiply
    1,113.94x = 1,670.81 × 873.37
  4. Step 4: Simplify right side
    1,113.94x = 1,459,235.33
  5. Step 5: Solve for x
    x = 1,459,235.33/1,113.94
  6. Step 6: Final answer
    x = 1,309.98

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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.