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Finding the Fourth Proportional to 679.86, 1,020.29 and 350.60

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Solution

The fourth proportional to 679.86, 1,020.29 and 350.60 is: 526.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.86 : 1,020.29 = 350.60 : x
  2. Step 2: Convert to fraction form
    679.86/1,020.29 = 350.60/x
  3. Step 3: Cross multiply
    679.86x = 1,020.29 × 350.60
  4. Step 4: Simplify right side
    679.86x = 357,706.82
  5. Step 5: Solve for x
    x = 357,706.82/679.86
  6. Step 6: Final answer
    x = 526.15

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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.