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Finding the Fourth Proportional to 5,618.32, 8,430.84 and 2,158.48

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Solution

The fourth proportional to 5,618.32, 8,430.84 and 2,158.48 is: 3,239.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,618.32 : 8,430.84 = 2,158.48 : x
  2. Step 2: Convert to fraction form
    5,618.32/8,430.84 = 2,158.48/x
  3. Step 3: Cross multiply
    5,618.32x = 8,430.84 × 2,158.48
  4. Step 4: Simplify right side
    5,618.32x = 18,197,799.52
  5. Step 5: Solve for x
    x = 18,197,799.52/5,618.32
  6. Step 6: Final answer
    x = 3,239.01

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.