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Finding the Fourth Proportional to 631.95, 872.08 and 352.20

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Solution

The fourth proportional to 631.95, 872.08 and 352.20 is: 486.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.95 : 872.08 = 352.20 : x
  2. Step 2: Convert to fraction form
    631.95/872.08 = 352.20/x
  3. Step 3: Cross multiply
    631.95x = 872.08 × 352.20
  4. Step 4: Simplify right side
    631.95x = 307,144.82
  5. Step 5: Solve for x
    x = 307,144.82/631.95
  6. Step 6: Final answer
    x = 486.03

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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.