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Finding the Fourth Proportional to 631.81, 871.95 and 352.10

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Solution

The fourth proportional to 631.81, 871.95 and 352.10 is: 485.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.81 : 871.95 = 352.10 : x
  2. Step 2: Convert to fraction form
    631.81/871.95 = 352.10/x
  3. Step 3: Cross multiply
    631.81x = 871.95 × 352.10
  4. Step 4: Simplify right side
    631.81x = 307,013.60
  5. Step 5: Solve for x
    x = 307,013.60/631.81
  6. Step 6: Final answer
    x = 485.93

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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.