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Finding the Fourth Proportional to 1,292,866.56, 1,784,151.36 and 719,913.60

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Solution

The fourth proportional to 1,292,866.56, 1,784,151.36 and 719,913.60 is: 993,478.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292,866.56 : 1,784,151.36 = 719,913.60 : x
  2. Step 2: Convert to fraction form
    1,292,866.56/1,784,151.36 = 719,913.60/x
  3. Step 3: Cross multiply
    1,292,866.56x = 1,784,151.36 × 719,913.60
  4. Step 4: Simplify right side
    1,292,866.56x = 1,284,434,828,522.50
  5. Step 5: Solve for x
    x = 1,284,434,828,522.50/1,292,866.56
  6. Step 6: Final answer
    x = 993,478.27

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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.