Home / 1,555.81-2,333.21-1,209.53

Finding the Fourth Proportional to 1,555.81, 2,333.21 and 1,209.53

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Solution

The fourth proportional to 1,555.81, 2,333.21 and 1,209.53 is: 1,813.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.81 : 2,333.21 = 1,209.53 : x
  2. Step 2: Convert to fraction form
    1,555.81/2,333.21 = 1,209.53/x
  3. Step 3: Cross multiply
    1,555.81x = 2,333.21 × 1,209.53
  4. Step 4: Simplify right side
    1,555.81x = 2,822,087.28
  5. Step 5: Solve for x
    x = 2,822,087.28/1,555.81
  6. Step 6: Final answer
    x = 1,813.91

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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.