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Finding the Fourth Proportional to 712,186.79, 982,813.02 and 389,902.30

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Solution

The fourth proportional to 712,186.79, 982,813.02 and 389,902.30 is: 538,062.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,186.79 : 982,813.02 = 389,902.30 : x
  2. Step 2: Convert to fraction form
    712,186.79/982,813.02 = 389,902.30/x
  3. Step 3: Cross multiply
    712,186.79x = 982,813.02 × 389,902.30
  4. Step 4: Simplify right side
    712,186.79x = 383,201,052,053.88
  5. Step 5: Solve for x
    x = 383,201,052,053.88/712,186.79
  6. Step 6: Final answer
    x = 538,062.57

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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.