Home / 1,639.50-2,261.94-931.26

Finding the Fourth Proportional to 1,639.50, 2,261.94 and 931.26

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Solution

The fourth proportional to 1,639.50, 2,261.94 and 931.26 is: 1,284.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.50 : 2,261.94 = 931.26 : x
  2. Step 2: Convert to fraction form
    1,639.50/2,261.94 = 931.26/x
  3. Step 3: Cross multiply
    1,639.50x = 2,261.94 × 931.26
  4. Step 4: Simplify right side
    1,639.50x = 2,106,454.24
  5. Step 5: Solve for x
    x = 2,106,454.24/1,639.50
  6. Step 6: Final answer
    x = 1,284.82

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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.