Home / 1,669.32-2,507.40-1,428.60

Finding the Fourth Proportional to 1,669.32, 2,507.40 and 1,428.60

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Solution

The fourth proportional to 1,669.32, 2,507.40 and 1,428.60 is: 2,145.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,669.32 : 2,507.40 = 1,428.60 : x
  2. Step 2: Convert to fraction form
    1,669.32/2,507.40 = 1,428.60/x
  3. Step 3: Cross multiply
    1,669.32x = 2,507.40 × 1,428.60
  4. Step 4: Simplify right side
    1,669.32x = 3,582,071.64
  5. Step 5: Solve for x
    x = 3,582,071.64/1,669.32
  6. Step 6: Final answer
    x = 2,145.83

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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.