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Finding the Fourth Proportional to 3,615.50, 5,423.25 and 879.50

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Solution

The fourth proportional to 3,615.50, 5,423.25 and 879.50 is: 1,319.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,615.50 : 5,423.25 = 879.50 : x
  2. Step 2: Convert to fraction form
    3,615.50/5,423.25 = 879.50/x
  3. Step 3: Cross multiply
    3,615.50x = 5,423.25 × 879.50
  4. Step 4: Simplify right side
    3,615.50x = 4,769,748.38
  5. Step 5: Solve for x
    x = 4,769,748.38/3,615.50
  6. Step 6: Final answer
    x = 1,319.25

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1.5x scale

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.