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Finding the Fourth Proportional to 940.94, 1,298.65 and 899.41

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Solution

The fourth proportional to 940.94, 1,298.65 and 899.41 is: 1,241.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.94 : 1,298.65 = 899.41 : x
  2. Step 2: Convert to fraction form
    940.94/1,298.65 = 899.41/x
  3. Step 3: Cross multiply
    940.94x = 1,298.65 × 899.41
  4. Step 4: Simplify right side
    940.94x = 1,168,018.80
  5. Step 5: Solve for x
    x = 1,168,018.80/940.94
  6. Step 6: Final answer
    x = 1,241.33

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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.