Home / 1,639.76-2,459.16-1,623.20

Finding the Fourth Proportional to 1,639.76, 2,459.16 and 1,623.20

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Solution

The fourth proportional to 1,639.76, 2,459.16 and 1,623.20 is: 2,434.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.76 : 2,459.16 = 1,623.20 : x
  2. Step 2: Convert to fraction form
    1,639.76/2,459.16 = 1,623.20/x
  3. Step 3: Cross multiply
    1,639.76x = 2,459.16 × 1,623.20
  4. Step 4: Simplify right side
    1,639.76x = 3,991,708.51
  5. Step 5: Solve for x
    x = 3,991,708.51/1,639.76
  6. Step 6: Final answer
    x = 2,434.32

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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.