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Finding the Fourth Proportional to 714,292.26, 985,720.21 and 392,007.57

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Solution

The fourth proportional to 714,292.26, 985,720.21 and 392,007.57 is: 540,968.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,292.26 : 985,720.21 = 392,007.57 : x
  2. Step 2: Convert to fraction form
    714,292.26/985,720.21 = 392,007.57/x
  3. Step 3: Cross multiply
    714,292.26x = 985,720.21 × 392,007.57
  4. Step 4: Simplify right side
    714,292.26x = 386,409,784,221.99
  5. Step 5: Solve for x
    x = 386,409,784,221.99/714,292.26
  6. Step 6: Final answer
    x = 540,968.74

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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.