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Finding the Fourth Proportional to 635.09, 947.12 and 553.28

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Solution

The fourth proportional to 635.09, 947.12 and 553.28 is: 825.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.09 : 947.12 = 553.28 : x
  2. Step 2: Convert to fraction form
    635.09/947.12 = 553.28/x
  3. Step 3: Cross multiply
    635.09x = 947.12 × 553.28
  4. Step 4: Simplify right side
    635.09x = 524,015.05
  5. Step 5: Solve for x
    x = 524,015.05/635.09
  6. Step 6: Final answer
    x = 825.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.