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Finding the Fourth Proportional to 438,559.18, 605,221.61 and 257,401.73

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Solution

The fourth proportional to 438,559.18, 605,221.61 and 257,401.73 is: 355,220.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,559.18 : 605,221.61 = 257,401.73 : x
  2. Step 2: Convert to fraction form
    438,559.18/605,221.61 = 257,401.73/x
  3. Step 3: Cross multiply
    438,559.18x = 605,221.61 × 257,401.73
  4. Step 4: Simplify right side
    438,559.18x = 155,785,089,673.43
  5. Step 5: Solve for x
    x = 155,785,089,673.43/438,559.18
  6. Step 6: Final answer
    x = 355,220.22

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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.