Home / 1,869.89-2,581.34-1,283.45

Finding the Fourth Proportional to 1,869.89, 2,581.34 and 1,283.45

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Solution

The fourth proportional to 1,869.89, 2,581.34 and 1,283.45 is: 1,771.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.89 : 2,581.34 = 1,283.45 : x
  2. Step 2: Convert to fraction form
    1,869.89/2,581.34 = 1,283.45/x
  3. Step 3: Cross multiply
    1,869.89x = 2,581.34 × 1,283.45
  4. Step 4: Simplify right side
    1,869.89x = 3,313,001.50
  5. Step 5: Solve for x
    x = 3,313,001.50/1,869.89
  6. Step 6: Final answer
    x = 1,771.77

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1.5x scale

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.