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Finding the Fourth Proportional to 919.98, 1,372.44 and 894.87

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Solution

The fourth proportional to 919.98, 1,372.44 and 894.87 is: 1,334.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.98 : 1,372.44 = 894.87 : x
  2. Step 2: Convert to fraction form
    919.98/1,372.44 = 894.87/x
  3. Step 3: Cross multiply
    919.98x = 1,372.44 × 894.87
  4. Step 4: Simplify right side
    919.98x = 1,228,155.38
  5. Step 5: Solve for x
    x = 1,228,155.38/919.98
  6. Step 6: Final answer
    x = 1,334.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.