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Finding the Fourth Proportional to 725,657.30, 1,001,419.06 and 398,984.12

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Solution

The fourth proportional to 725,657.30, 1,001,419.06 and 398,984.12 is: 550,604.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,657.30 : 1,001,419.06 = 398,984.12 : x
  2. Step 2: Convert to fraction form
    725,657.30/1,001,419.06 = 398,984.12/x
  3. Step 3: Cross multiply
    725,657.30x = 1,001,419.06 × 398,984.12
  4. Step 4: Simplify right side
    725,657.30x = 399,550,302,405.33
  5. Step 5: Solve for x
    x = 399,550,302,405.33/725,657.30
  6. Step 6: Final answer
    x = 550,604.68

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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.