Home / 1,639.22-2,459.18-485.06

Finding the Fourth Proportional to 1,639.22, 2,459.18 and 485.06

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Solution

The fourth proportional to 1,639.22, 2,459.18 and 485.06 is: 727.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.22 : 2,459.18 = 485.06 : x
  2. Step 2: Convert to fraction form
    1,639.22/2,459.18 = 485.06/x
  3. Step 3: Cross multiply
    1,639.22x = 2,459.18 × 485.06
  4. Step 4: Simplify right side
    1,639.22x = 1,192,838.77
  5. Step 5: Solve for x
    x = 1,192,838.77/1,639.22
  6. Step 6: Final answer
    x = 727.69

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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.