Home / 1,869.49-2,565.68-1,720.45

Finding the Fourth Proportional to 1,869.49, 2,565.68 and 1,720.45

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Solution

The fourth proportional to 1,869.49, 2,565.68 and 1,720.45 is: 2,361.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.49 : 2,565.68 = 1,720.45 : x
  2. Step 2: Convert to fraction form
    1,869.49/2,565.68 = 1,720.45/x
  3. Step 3: Cross multiply
    1,869.49x = 2,565.68 × 1,720.45
  4. Step 4: Simplify right side
    1,869.49x = 4,414,115.55
  5. Step 5: Solve for x
    x = 4,414,115.55/1,869.49
  6. Step 6: Final answer
    x = 2,361.13

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.