Home / 1,211.55-1,815.30-1,037.40

Finding the Fourth Proportional to 1,211.55, 1,815.30 and 1,037.40

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Solution

The fourth proportional to 1,211.55, 1,815.30 and 1,037.40 is: 1,554.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.55 : 1,815.30 = 1,037.40 : x
  2. Step 2: Convert to fraction form
    1,211.55/1,815.30 = 1,037.40/x
  3. Step 3: Cross multiply
    1,211.55x = 1,815.30 × 1,037.40
  4. Step 4: Simplify right side
    1,211.55x = 1,883,192.22
  5. Step 5: Solve for x
    x = 1,883,192.22/1,211.55
  6. Step 6: Final answer
    x = 1,554.37

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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.