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Finding the Fourth Proportional to 419,638.60, 579,103.86 and 249,879.88

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Solution

The fourth proportional to 419,638.60, 579,103.86 and 249,879.88 is: 344,835.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,638.60 : 579,103.86 = 249,879.88 : x
  2. Step 2: Convert to fraction form
    419,638.60/579,103.86 = 249,879.88/x
  3. Step 3: Cross multiply
    419,638.60x = 579,103.86 × 249,879.88
  4. Step 4: Simplify right side
    419,638.60x = 144,706,403,044.34
  5. Step 5: Solve for x
    x = 144,706,403,044.34/419,638.60
  6. Step 6: Final answer
    x = 344,835.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.