Home / 1,428.15-2,141.30-606.20

Finding the Fourth Proportional to 1,428.15, 2,141.30 and 606.20

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Solution

The fourth proportional to 1,428.15, 2,141.30 and 606.20 is: 908.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.15 : 2,141.30 = 606.20 : x
  2. Step 2: Convert to fraction form
    1,428.15/2,141.30 = 606.20/x
  3. Step 3: Cross multiply
    1,428.15x = 2,141.30 × 606.20
  4. Step 4: Simplify right side
    1,428.15x = 1,298,056.06
  5. Step 5: Solve for x
    x = 1,298,056.06/1,428.15
  6. Step 6: Final answer
    x = 908.91

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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.