Home / 1,285.19-1,929.95-1,219.43

Finding the Fourth Proportional to 1,285.19, 1,929.95 and 1,219.43

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Solution

The fourth proportional to 1,285.19, 1,929.95 and 1,219.43 is: 1,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.19 : 1,929.95 = 1,219.43 : x
  2. Step 2: Convert to fraction form
    1,285.19/1,929.95 = 1,219.43/x
  3. Step 3: Cross multiply
    1,285.19x = 1,929.95 × 1,219.43
  4. Step 4: Simplify right side
    1,285.19x = 2,353,438.93
  5. Step 5: Solve for x
    x = 2,353,438.93/1,285.19
  6. Step 6: Final answer
    x = 1,831.20

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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.