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Finding the Fourth Proportional to 5,754.40, 8,631.60 and 1,859.20

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Solution

The fourth proportional to 5,754.40, 8,631.60 and 1,859.20 is: 2,788.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,754.40 : 8,631.60 = 1,859.20 : x
  2. Step 2: Convert to fraction form
    5,754.40/8,631.60 = 1,859.20/x
  3. Step 3: Cross multiply
    5,754.40x = 8,631.60 × 1,859.20
  4. Step 4: Simplify right side
    5,754.40x = 16,047,870.72
  5. Step 5: Solve for x
    x = 16,047,870.72/5,754.40
  6. Step 6: Final answer
    x = 2,788.80

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Double scale
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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.