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Finding the Fourth Proportional to 717,238.20, 989,788.86 and 394,947.48

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Solution

The fourth proportional to 717,238.20, 989,788.86 and 394,947.48 is: 545,027.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,238.20 : 989,788.86 = 394,947.48 : x
  2. Step 2: Convert to fraction form
    717,238.20/989,788.86 = 394,947.48/x
  3. Step 3: Cross multiply
    717,238.20x = 989,788.86 × 394,947.48
  4. Step 4: Simplify right side
    717,238.20x = 390,914,615,989.07
  5. Step 5: Solve for x
    x = 390,914,615,989.07/717,238.20
  6. Step 6: Final answer
    x = 545,027.60

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1.5x scale

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.