Home / 1,431.08-2,145.09-608.66

Finding the Fourth Proportional to 1,431.08, 2,145.09 and 608.66

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Solution

The fourth proportional to 1,431.08, 2,145.09 and 608.66 is: 912.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.08 : 2,145.09 = 608.66 : x
  2. Step 2: Convert to fraction form
    1,431.08/2,145.09 = 608.66/x
  3. Step 3: Cross multiply
    1,431.08x = 2,145.09 × 608.66
  4. Step 4: Simplify right side
    1,431.08x = 1,305,630.48
  5. Step 5: Solve for x
    x = 1,305,630.48/1,431.08
  6. Step 6: Final answer
    x = 912.34

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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.