Home / 1,639.14-2,262.12-931.01

Finding the Fourth Proportional to 1,639.14, 2,262.12 and 931.01

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Solution

The fourth proportional to 1,639.14, 2,262.12 and 931.01 is: 1,284.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.14 : 2,262.12 = 931.01 : x
  2. Step 2: Convert to fraction form
    1,639.14/2,262.12 = 931.01/x
  3. Step 3: Cross multiply
    1,639.14x = 2,262.12 × 931.01
  4. Step 4: Simplify right side
    1,639.14x = 2,106,045.03
  5. Step 5: Solve for x
    x = 2,106,045.03/1,639.14
  6. Step 6: Final answer
    x = 1,284.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.