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Finding the Fourth Proportional to 722.01, 995.36 and 485.54

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Solution

The fourth proportional to 722.01, 995.36 and 485.54 is: 669.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.01 : 995.36 = 485.54 : x
  2. Step 2: Convert to fraction form
    722.01/995.36 = 485.54/x
  3. Step 3: Cross multiply
    722.01x = 995.36 × 485.54
  4. Step 4: Simplify right side
    722.01x = 483,287.09
  5. Step 5: Solve for x
    x = 483,287.09/722.01
  6. Step 6: Final answer
    x = 669.36

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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.