Home / 2,981.61-4,114.75-1,861.68

Finding the Fourth Proportional to 2,981.61, 4,114.75 and 1,861.68

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Solution

The fourth proportional to 2,981.61, 4,114.75 and 1,861.68 is: 2,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.61 : 4,114.75 = 1,861.68 : x
  2. Step 2: Convert to fraction form
    2,981.61/4,114.75 = 1,861.68/x
  3. Step 3: Cross multiply
    2,981.61x = 4,114.75 × 1,861.68
  4. Step 4: Simplify right side
    2,981.61x = 7,660,362.05
  5. Step 5: Solve for x
    x = 7,660,362.05/2,981.61
  6. Step 6: Final answer
    x = 2,569.20

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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.