Home / 1,914.38-2,871.63-615.81

Finding the Fourth Proportional to 1,914.38, 2,871.63 and 615.81

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Solution

The fourth proportional to 1,914.38, 2,871.63 and 615.81 is: 923.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,914.38 : 2,871.63 = 615.81 : x
  2. Step 2: Convert to fraction form
    1,914.38/2,871.63 = 615.81/x
  3. Step 3: Cross multiply
    1,914.38x = 2,871.63 × 615.81
  4. Step 4: Simplify right side
    1,914.38x = 1,768,378.47
  5. Step 5: Solve for x
    x = 1,768,378.47/1,914.38
  6. Step 6: Final answer
    x = 923.74

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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.