Home / 1,459.20-2,188.40-485.16

Finding the Fourth Proportional to 1,459.20, 2,188.40 and 485.16

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Solution

The fourth proportional to 1,459.20, 2,188.40 and 485.16 is: 727.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,459.20 : 2,188.40 = 485.16 : x
  2. Step 2: Convert to fraction form
    1,459.20/2,188.40 = 485.16/x
  3. Step 3: Cross multiply
    1,459.20x = 2,188.40 × 485.16
  4. Step 4: Simplify right side
    1,459.20x = 1,061,724.14
  5. Step 5: Solve for x
    x = 1,061,724.14/1,459.20
  6. Step 6: Final answer
    x = 727.61

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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.