Home / 2,971.85-4,457.18-1,390.12

Finding the Fourth Proportional to 2,971.85, 4,457.18 and 1,390.12

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Solution

The fourth proportional to 2,971.85, 4,457.18 and 1,390.12 is: 2,084.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.85 : 4,457.18 = 1,390.12 : x
  2. Step 2: Convert to fraction form
    2,971.85/4,457.18 = 1,390.12/x
  3. Step 3: Cross multiply
    2,971.85x = 4,457.18 × 1,390.12
  4. Step 4: Simplify right side
    2,971.85x = 6,196,007.39
  5. Step 5: Solve for x
    x = 6,196,007.39/2,971.85
  6. Step 6: Final answer
    x = 2,084.90

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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.