Home / 2,985.98-4,120.74-1,806.36

Finding the Fourth Proportional to 2,985.98, 4,120.74 and 1,806.36

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Solution

The fourth proportional to 2,985.98, 4,120.74 and 1,806.36 is: 2,492.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.98 : 4,120.74 = 1,806.36 : x
  2. Step 2: Convert to fraction form
    2,985.98/4,120.74 = 1,806.36/x
  3. Step 3: Cross multiply
    2,985.98x = 4,120.74 × 1,806.36
  4. Step 4: Simplify right side
    2,985.98x = 7,443,539.91
  5. Step 5: Solve for x
    x = 7,443,539.91/2,985.98
  6. Step 6: Final answer
    x = 2,492.83

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1.5x scale

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.