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Finding the Fourth Proportional to 712,189.72, 982,834.14 and 389,894.68

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Solution

The fourth proportional to 712,189.72, 982,834.14 and 389,894.68 is: 538,061.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,189.72 : 982,834.14 = 389,894.68 : x
  2. Step 2: Convert to fraction form
    712,189.72/982,834.14 = 389,894.68/x
  3. Step 3: Cross multiply
    712,189.72x = 982,834.14 × 389,894.68
  4. Step 4: Simplify right side
    712,189.72x = 383,201,802,508.38
  5. Step 5: Solve for x
    x = 383,201,802,508.38/712,189.72
  6. Step 6: Final answer
    x = 538,061.41

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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.