Home / 2,985.63-4,120.25-1,806.01

Finding the Fourth Proportional to 2,985.63, 4,120.25 and 1,806.01

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Solution

The fourth proportional to 2,985.63, 4,120.25 and 1,806.01 is: 2,492.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.63 : 4,120.25 = 1,806.01 : x
  2. Step 2: Convert to fraction form
    2,985.63/4,120.25 = 1,806.01/x
  3. Step 3: Cross multiply
    2,985.63x = 4,120.25 × 1,806.01
  4. Step 4: Simplify right side
    2,985.63x = 7,441,212.70
  5. Step 5: Solve for x
    x = 7,441,212.70/2,985.63
  6. Step 6: Final answer
    x = 2,492.34

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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.