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Finding the Fourth Proportional to 782,100, 1,079,298 and 424,404

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Solution

The fourth proportional to 782,100, 1,079,298 and 424,404 is: 585,677.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,100 : 1,079,298 = 424,404 : x
  2. Step 2: Convert to fraction form
    782,100/1,079,298 = 424,404/x
  3. Step 3: Cross multiply
    782,100x = 1,079,298 × 424,404
  4. Step 4: Simplify right side
    782,100x = 458,058,388,392
  5. Step 5: Solve for x
    x = 458,058,388,392/782,100
  6. Step 6: Final answer
    x = 585,677.52

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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.