Home / 1,911.96-2,869.35-1,423.53

Finding the Fourth Proportional to 1,911.96, 2,869.35 and 1,423.53

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Solution

The fourth proportional to 1,911.96, 2,869.35 and 1,423.53 is: 2,136.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.96 : 2,869.35 = 1,423.53 : x
  2. Step 2: Convert to fraction form
    1,911.96/2,869.35 = 1,423.53/x
  3. Step 3: Cross multiply
    1,911.96x = 2,869.35 × 1,423.53
  4. Step 4: Simplify right side
    1,911.96x = 4,084,605.81
  5. Step 5: Solve for x
    x = 4,084,605.81/1,911.96
  6. Step 6: Final answer
    x = 2,136.34

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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.