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Finding the Fourth Proportional to 919.76, 1,267.25 and 722.93

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Solution

The fourth proportional to 919.76, 1,267.25 and 722.93 is: 996.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.76 : 1,267.25 = 722.93 : x
  2. Step 2: Convert to fraction form
    919.76/1,267.25 = 722.93/x
  3. Step 3: Cross multiply
    919.76x = 1,267.25 × 722.93
  4. Step 4: Simplify right side
    919.76x = 916,123.09
  5. Step 5: Solve for x
    x = 916,123.09/919.76
  6. Step 6: Final answer
    x = 996.05

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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.