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Finding the Fourth Proportional to 5,813.20, 8,719.80 and 1,917.10

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Solution

The fourth proportional to 5,813.20, 8,719.80 and 1,917.10 is: 2,875.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,813.20 : 8,719.80 = 1,917.10 : x
  2. Step 2: Convert to fraction form
    5,813.20/8,719.80 = 1,917.10/x
  3. Step 3: Cross multiply
    5,813.20x = 8,719.80 × 1,917.10
  4. Step 4: Simplify right side
    5,813.20x = 16,716,728.58
  5. Step 5: Solve for x
    x = 16,716,728.58/5,813.20
  6. Step 6: Final answer
    x = 2,875.65

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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.