Home / 3,985.23-5,980.57-1,388.17

Finding the Fourth Proportional to 3,985.23, 5,980.57 and 1,388.17

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Solution

The fourth proportional to 3,985.23, 5,980.57 and 1,388.17 is: 2,083.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.23 : 5,980.57 = 1,388.17 : x
  2. Step 2: Convert to fraction form
    3,985.23/5,980.57 = 1,388.17/x
  3. Step 3: Cross multiply
    3,985.23x = 5,980.57 × 1,388.17
  4. Step 4: Simplify right side
    3,985.23x = 8,302,047.86
  5. Step 5: Solve for x
    x = 8,302,047.86/3,985.23
  6. Step 6: Final answer
    x = 2,083.20

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1.5x scale

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.