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Finding the Fourth Proportional to 919.41, 1,270.08 and 836.37

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Solution

The fourth proportional to 919.41, 1,270.08 and 836.37 is: 1,155.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.41 : 1,270.08 = 836.37 : x
  2. Step 2: Convert to fraction form
    919.41/1,270.08 = 836.37/x
  3. Step 3: Cross multiply
    919.41x = 1,270.08 × 836.37
  4. Step 4: Simplify right side
    919.41x = 1,062,252.63
  5. Step 5: Solve for x
    x = 1,062,252.63/919.41
  6. Step 6: Final answer
    x = 1,155.36

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1.5x scale

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.