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Finding the Fourth Proportional to 2,898.87, 3,999.83 and 1,720.32

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Solution

The fourth proportional to 2,898.87, 3,999.83 and 1,720.32 is: 2,373.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,898.87 : 3,999.83 = 1,720.32 : x
  2. Step 2: Convert to fraction form
    2,898.87/3,999.83 = 1,720.32/x
  3. Step 3: Cross multiply
    2,898.87x = 3,999.83 × 1,720.32
  4. Step 4: Simplify right side
    2,898.87x = 6,880,978.94
  5. Step 5: Solve for x
    x = 6,880,978.94/2,898.87
  6. Step 6: Final answer
    x = 2,373.68

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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.