Home / 1,639.54-2,262.36-931.34

Finding the Fourth Proportional to 1,639.54, 2,262.36 and 931.34

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Solution

The fourth proportional to 1,639.54, 2,262.36 and 931.34 is: 1,285.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.54 : 2,262.36 = 931.34 : x
  2. Step 2: Convert to fraction form
    1,639.54/2,262.36 = 931.34/x
  3. Step 3: Cross multiply
    1,639.54x = 2,262.36 × 931.34
  4. Step 4: Simplify right side
    1,639.54x = 2,107,026.36
  5. Step 5: Solve for x
    x = 2,107,026.36/1,639.54
  6. Step 6: Final answer
    x = 1,285.13

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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.