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Finding the Fourth Proportional to 879,573.60, 1,317,805.20 and 780,040.80

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Solution

The fourth proportional to 879,573.60, 1,317,805.20 and 780,040.80 is: 1,168,681.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,573.60 : 1,317,805.20 = 780,040.80 : x
  2. Step 2: Convert to fraction form
    879,573.60/1,317,805.20 = 780,040.80/x
  3. Step 3: Cross multiply
    879,573.60x = 1,317,805.20 × 780,040.80
  4. Step 4: Simplify right side
    879,573.60x = 1,027,941,822,452.16
  5. Step 5: Solve for x
    x = 1,027,941,822,452.16/879,573.60
  6. Step 6: Final answer
    x = 1,168,681.99

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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.