Home / 1,286,431.60-1,929,740.30-339,790

Finding the Fourth Proportional to 1,286,431.60, 1,929,740.30 and 339,790

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Solution

The fourth proportional to 1,286,431.60, 1,929,740.30 and 339,790 is: 509,709.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286,431.60 : 1,929,740.30 = 339,790 : x
  2. Step 2: Convert to fraction form
    1,286,431.60/1,929,740.30 = 339,790/x
  3. Step 3: Cross multiply
    1,286,431.60x = 1,929,740.30 × 339,790
  4. Step 4: Simplify right side
    1,286,431.60x = 655,706,456,537
  5. Step 5: Solve for x
    x = 655,706,456,537/1,286,431.60
  6. Step 6: Final answer
    x = 509,709.54

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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.