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Finding the Fourth Proportional to 1,784,690.64, 2,461,960.80 and 1,139,432.88

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Solution

The fourth proportional to 1,784,690.64, 2,461,960.80 and 1,139,432.88 is: 1,571,834.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,784,690.64 : 2,461,960.80 = 1,139,432.88 : x
  2. Step 2: Convert to fraction form
    1,784,690.64/2,461,960.80 = 1,139,432.88/x
  3. Step 3: Cross multiply
    1,784,690.64x = 2,461,960.80 × 1,139,432.88
  4. Step 4: Simplify right side
    1,784,690.64x = 2,805,239,084,791.10
  5. Step 5: Solve for x
    x = 2,805,239,084,791.10/1,784,690.64
  6. Step 6: Final answer
    x = 1,571,834.93

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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.