Home / 1,431.36-2,146.50-609.21

Finding the Fourth Proportional to 1,431.36, 2,146.50 and 609.21

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Solution

The fourth proportional to 1,431.36, 2,146.50 and 609.21 is: 913.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.36 : 2,146.50 = 609.21 : x
  2. Step 2: Convert to fraction form
    1,431.36/2,146.50 = 609.21/x
  3. Step 3: Cross multiply
    1,431.36x = 2,146.50 × 609.21
  4. Step 4: Simplify right side
    1,431.36x = 1,307,669.27
  5. Step 5: Solve for x
    x = 1,307,669.27/1,431.36
  6. Step 6: Final answer
    x = 913.59

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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.