Home / 1,898.10-2,831.90-1,690.20

Finding the Fourth Proportional to 1,898.10, 2,831.90 and 1,690.20

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Solution

The fourth proportional to 1,898.10, 2,831.90 and 1,690.20 is: 2,521.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,898.10 : 2,831.90 = 1,690.20 : x
  2. Step 2: Convert to fraction form
    1,898.10/2,831.90 = 1,690.20/x
  3. Step 3: Cross multiply
    1,898.10x = 2,831.90 × 1,690.20
  4. Step 4: Simplify right side
    1,898.10x = 4,786,468.93
  5. Step 5: Solve for x
    x = 4,786,468.93/1,898.10
  6. Step 6: Final answer
    x = 2,521.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.