Home / 1,380.00-2,070.06-406.18

Finding the Fourth Proportional to 1,380.00, 2,070.06 and 406.18

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Solution

The fourth proportional to 1,380.00, 2,070.06 and 406.18 is: 609.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.00 : 2,070.06 = 406.18 : x
  2. Step 2: Convert to fraction form
    1,380.00/2,070.06 = 406.18/x
  3. Step 3: Cross multiply
    1,380.00x = 2,070.06 × 406.18
  4. Step 4: Simplify right side
    1,380.00x = 840,818.04
  5. Step 5: Solve for x
    x = 840,818.04/1,380.00
  6. Step 6: Final answer
    x = 609.29

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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.