Home / 1,871.88-2,581.53-1,428.96

Finding the Fourth Proportional to 1,871.88, 2,581.53 and 1,428.96

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Solution

The fourth proportional to 1,871.88, 2,581.53 and 1,428.96 is: 1,970.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871.88 : 2,581.53 = 1,428.96 : x
  2. Step 2: Convert to fraction form
    1,871.88/2,581.53 = 1,428.96/x
  3. Step 3: Cross multiply
    1,871.88x = 2,581.53 × 1,428.96
  4. Step 4: Simplify right side
    1,871.88x = 3,688,903.11
  5. Step 5: Solve for x
    x = 3,688,903.11/1,871.88
  6. Step 6: Final answer
    x = 1,970.69

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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.