Home / 1,286,420.60-1,929,723.78-339,779

Finding the Fourth Proportional to 1,286,420.60, 1,929,723.78 and 339,779

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Solution

The fourth proportional to 1,286,420.60, 1,929,723.78 and 339,779 is: 509,693.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286,420.60 : 1,929,723.78 = 339,779 : x
  2. Step 2: Convert to fraction form
    1,286,420.60/1,929,723.78 = 339,779/x
  3. Step 3: Cross multiply
    1,286,420.60x = 1,929,723.78 × 339,779
  4. Step 4: Simplify right side
    1,286,420.60x = 655,679,616,244.62
  5. Step 5: Solve for x
    x = 655,679,616,244.62/1,286,420.60
  6. Step 6: Final answer
    x = 509,693.03

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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.