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Finding the Fourth Proportional to 609,470, 840,789.48 and 394,679.24

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Solution

The fourth proportional to 609,470, 840,789.48 and 394,679.24 is: 544,476.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,470 : 840,789.48 = 394,679.24 : x
  2. Step 2: Convert to fraction form
    609,470/840,789.48 = 394,679.24/x
  3. Step 3: Cross multiply
    609,470x = 840,789.48 × 394,679.24
  4. Step 4: Simplify right side
    609,470x = 331,842,152,966.40
  5. Step 5: Solve for x
    x = 331,842,152,966.40/609,470
  6. Step 6: Final answer
    x = 544,476.60

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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.