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Finding the Fourth Proportional to 633,986.76, 874,991.40 and 392,347.14

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Solution

The fourth proportional to 633,986.76, 874,991.40 and 392,347.14 is: 541,494.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,986.76 : 874,991.40 = 392,347.14 : x
  2. Step 2: Convert to fraction form
    633,986.76/874,991.40 = 392,347.14/x
  3. Step 3: Cross multiply
    633,986.76x = 874,991.40 × 392,347.14
  4. Step 4: Simplify right side
    633,986.76x = 343,300,373,314.60
  5. Step 5: Solve for x
    x = 343,300,373,314.60/633,986.76
  6. Step 6: Final answer
    x = 541,494.55

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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.