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Finding the Fourth Proportional to 679.61, 1,018.67 and 332.55

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Solution

The fourth proportional to 679.61, 1,018.67 and 332.55 is: 498.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.61 : 1,018.67 = 332.55 : x
  2. Step 2: Convert to fraction form
    679.61/1,018.67 = 332.55/x
  3. Step 3: Cross multiply
    679.61x = 1,018.67 × 332.55
  4. Step 4: Simplify right side
    679.61x = 338,758.71
  5. Step 5: Solve for x
    x = 338,758.71/679.61
  6. Step 6: Final answer
    x = 498.46

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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.