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Finding the Fourth Proportional to 919.94, 1,265.74 and 795.20

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Solution

The fourth proportional to 919.94, 1,265.74 and 795.20 is: 1,094.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.94 : 1,265.74 = 795.20 : x
  2. Step 2: Convert to fraction form
    919.94/1,265.74 = 795.20/x
  3. Step 3: Cross multiply
    919.94x = 1,265.74 × 795.20
  4. Step 4: Simplify right side
    919.94x = 1,006,516.45
  5. Step 5: Solve for x
    x = 1,006,516.45/919.94
  6. Step 6: Final answer
    x = 1,094.11

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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.