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Finding the Fourth Proportional to 5,615.86, 8,423.79 and 1,719.76

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Solution

The fourth proportional to 5,615.86, 8,423.79 and 1,719.76 is: 2,579.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,615.86 : 8,423.79 = 1,719.76 : x
  2. Step 2: Convert to fraction form
    5,615.86/8,423.79 = 1,719.76/x
  3. Step 3: Cross multiply
    5,615.86x = 8,423.79 × 1,719.76
  4. Step 4: Simplify right side
    5,615.86x = 14,486,897.09
  5. Step 5: Solve for x
    x = 14,486,897.09/5,615.86
  6. Step 6: Final answer
    x = 2,579.64

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Similar ratio
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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.