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Finding the Fourth Proportional to 679.51, 1,019.45 and 332.83

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Solution

The fourth proportional to 679.51, 1,019.45 and 332.83 is: 499.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.51 : 1,019.45 = 332.83 : x
  2. Step 2: Convert to fraction form
    679.51/1,019.45 = 332.83/x
  3. Step 3: Cross multiply
    679.51x = 1,019.45 × 332.83
  4. Step 4: Simplify right side
    679.51x = 339,303.54
  5. Step 5: Solve for x
    x = 339,303.54/679.51
  6. Step 6: Final answer
    x = 499.34

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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.