Home / 1,431.03-2,146.53-813.89

Finding the Fourth Proportional to 1,431.03, 2,146.53 and 813.89

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Solution

The fourth proportional to 1,431.03, 2,146.53 and 813.89 is: 1,220.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.03 : 2,146.53 = 813.89 : x
  2. Step 2: Convert to fraction form
    1,431.03/2,146.53 = 813.89/x
  3. Step 3: Cross multiply
    1,431.03x = 2,146.53 × 813.89
  4. Step 4: Simplify right side
    1,431.03x = 1,747,028.57
  5. Step 5: Solve for x
    x = 1,747,028.57/1,431.03
  6. Step 6: Final answer
    x = 1,220.82

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1.5x scale

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.