Home / 1,405.40-2,104.05-1,325.30

Finding the Fourth Proportional to 1,405.40, 2,104.05 and 1,325.30

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Solution

The fourth proportional to 1,405.40, 2,104.05 and 1,325.30 is: 1,984.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.40 : 2,104.05 = 1,325.30 : x
  2. Step 2: Convert to fraction form
    1,405.40/2,104.05 = 1,325.30/x
  3. Step 3: Cross multiply
    1,405.40x = 2,104.05 × 1,325.30
  4. Step 4: Simplify right side
    1,405.40x = 2,788,497.47
  5. Step 5: Solve for x
    x = 2,788,497.47/1,405.40
  6. Step 6: Final answer
    x = 1,984.13

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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.