Home / 1,288.20-1,929.06-999.84

Finding the Fourth Proportional to 1,288.20, 1,929.06 and 999.84

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Solution

The fourth proportional to 1,288.20, 1,929.06 and 999.84 is: 1,497.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.20 : 1,929.06 = 999.84 : x
  2. Step 2: Convert to fraction form
    1,288.20/1,929.06 = 999.84/x
  3. Step 3: Cross multiply
    1,288.20x = 1,929.06 × 999.84
  4. Step 4: Simplify right side
    1,288.20x = 1,928,751.35
  5. Step 5: Solve for x
    x = 1,928,751.35/1,288.20
  6. Step 6: Final answer
    x = 1,497.25

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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.