Home / 2,985.65-4,120-1,866.53

Finding the Fourth Proportional to 2,985.65, 4,120 and 1,866.53

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Solution

The fourth proportional to 2,985.65, 4,120 and 1,866.53 is: 2,575.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.65 : 4,120 = 1,866.53 : x
  2. Step 2: Convert to fraction form
    2,985.65/4,120 = 1,866.53/x
  3. Step 3: Cross multiply
    2,985.65x = 4,120 × 1,866.53
  4. Step 4: Simplify right side
    2,985.65x = 7,690,103.60
  5. Step 5: Solve for x
    x = 7,690,103.60/2,985.65
  6. Step 6: Final answer
    x = 2,575.69

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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.