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Finding the Fourth Proportional to 686,791.04, 947,771.69 and 380,914.18

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Solution

The fourth proportional to 686,791.04, 947,771.69 and 380,914.18 is: 525,661.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,791.04 : 947,771.69 = 380,914.18 : x
  2. Step 2: Convert to fraction form
    686,791.04/947,771.69 = 380,914.18/x
  3. Step 3: Cross multiply
    686,791.04x = 947,771.69 × 380,914.18
  4. Step 4: Simplify right side
    686,791.04x = 361,019,671,849.56
  5. Step 5: Solve for x
    x = 361,019,671,849.56/686,791.04
  6. Step 6: Final answer
    x = 525,661.60

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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.