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Finding the Fourth Proportional to 5,719.76, 8,579.16 and 1,615.76

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Solution

The fourth proportional to 5,719.76, 8,579.16 and 1,615.76 is: 2,423.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,719.76 : 8,579.16 = 1,615.76 : x
  2. Step 2: Convert to fraction form
    5,719.76/8,579.16 = 1,615.76/x
  3. Step 3: Cross multiply
    5,719.76x = 8,579.16 × 1,615.76
  4. Step 4: Simplify right side
    5,719.76x = 13,861,863.56
  5. Step 5: Solve for x
    x = 13,861,863.56/5,719.76
  6. Step 6: Final answer
    x = 2,423.50

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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.