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Finding the Fourth Proportional to 941.94, 1,300.40 and 721.32

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Solution

The fourth proportional to 941.94, 1,300.40 and 721.32 is: 995.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.94 : 1,300.40 = 721.32 : x
  2. Step 2: Convert to fraction form
    941.94/1,300.40 = 721.32/x
  3. Step 3: Cross multiply
    941.94x = 1,300.40 × 721.32
  4. Step 4: Simplify right side
    941.94x = 938,000.92
  5. Step 5: Solve for x
    x = 938,000.92/941.94
  6. Step 6: Final answer
    x = 995.82

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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.