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Finding the Fourth Proportional to 631.67, 869.06 and 556.64

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Solution

The fourth proportional to 631.67, 869.06 and 556.64 is: 765.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.67 : 869.06 = 556.64 : x
  2. Step 2: Convert to fraction form
    631.67/869.06 = 556.64/x
  3. Step 3: Cross multiply
    631.67x = 869.06 × 556.64
  4. Step 4: Simplify right side
    631.67x = 483,750.73
  5. Step 5: Solve for x
    x = 483,750.73/631.67
  6. Step 6: Final answer
    x = 765.83

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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.