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Finding the Fourth Proportional to 991.07, 1,485.44 and 552.11

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Solution

The fourth proportional to 991.07, 1,485.44 and 552.11 is: 827.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    991.07 : 1,485.44 = 552.11 : x
  2. Step 2: Convert to fraction form
    991.07/1,485.44 = 552.11/x
  3. Step 3: Cross multiply
    991.07x = 1,485.44 × 552.11
  4. Step 4: Simplify right side
    991.07x = 820,116.09
  5. Step 5: Solve for x
    x = 820,116.09/991.07
  6. Step 6: Final answer
    x = 827.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.