Home / 1,639.93-2,262.91-931.52

Finding the Fourth Proportional to 1,639.93, 2,262.91 and 931.52

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Solution

The fourth proportional to 1,639.93, 2,262.91 and 931.52 is: 1,285.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.93 : 2,262.91 = 931.52 : x
  2. Step 2: Convert to fraction form
    1,639.93/2,262.91 = 931.52/x
  3. Step 3: Cross multiply
    1,639.93x = 2,262.91 × 931.52
  4. Step 4: Simplify right side
    1,639.93x = 2,107,945.92
  5. Step 5: Solve for x
    x = 2,107,945.92/1,639.93
  6. Step 6: Final answer
    x = 1,285.39

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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.