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Finding the Fourth Proportional to 5,311.74, 7,967.79 and 1,613.97

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Solution

The fourth proportional to 5,311.74, 7,967.79 and 1,613.97 is: 2,421.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,311.74 : 7,967.79 = 1,613.97 : x
  2. Step 2: Convert to fraction form
    5,311.74/7,967.79 = 1,613.97/x
  3. Step 3: Cross multiply
    5,311.74x = 7,967.79 × 1,613.97
  4. Step 4: Simplify right side
    5,311.74x = 12,859,756.16
  5. Step 5: Solve for x
    x = 12,859,756.16/5,311.74
  6. Step 6: Final answer
    x = 2,421.00

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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.