Home / 3,855.84-5,779.52-1,515.12

Finding the Fourth Proportional to 3,855.84, 5,779.52 and 1,515.12

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Solution

The fourth proportional to 3,855.84, 5,779.52 and 1,515.12 is: 2,271.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.84 : 5,779.52 = 1,515.12 : x
  2. Step 2: Convert to fraction form
    3,855.84/5,779.52 = 1,515.12/x
  3. Step 3: Cross multiply
    3,855.84x = 5,779.52 × 1,515.12
  4. Step 4: Simplify right side
    3,855.84x = 8,756,666.34
  5. Step 5: Solve for x
    x = 8,756,666.34/3,855.84
  6. Step 6: Final answer
    x = 2,271.01

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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.