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Finding the Fourth Proportional to 919,139.20, 1,375,987.20 and 683,526.40

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Solution

The fourth proportional to 919,139.20, 1,375,987.20 and 683,526.40 is: 1,023,265.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,139.20 : 1,375,987.20 = 683,526.40 : x
  2. Step 2: Convert to fraction form
    919,139.20/1,375,987.20 = 683,526.40/x
  3. Step 3: Cross multiply
    919,139.20x = 1,375,987.20 × 683,526.40
  4. Step 4: Simplify right side
    919,139.20x = 940,523,577,262.08
  5. Step 5: Solve for x
    x = 940,523,577,262.08/919,139.20
  6. Step 6: Final answer
    x = 1,023,265.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.