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Finding the Fourth Proportional to 609,465.25, 840,782.91 and 394,674.58

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Solution

The fourth proportional to 609,465.25, 840,782.91 and 394,674.58 is: 544,470.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,465.25 : 840,782.91 = 394,674.58 : x
  2. Step 2: Convert to fraction form
    609,465.25/840,782.91 = 394,674.58/x
  3. Step 3: Cross multiply
    609,465.25x = 840,782.91 × 394,674.58
  4. Step 4: Simplify right side
    609,465.25x = 331,835,641,875.43
  5. Step 5: Solve for x
    x = 331,835,641,875.43/609,465.25
  6. Step 6: Final answer
    x = 544,470.16

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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.