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Finding the Fourth Proportional to 4,907.20, 7,360.80 and 4,712.80

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Solution

The fourth proportional to 4,907.20, 7,360.80 and 4,712.80 is: 7,069.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,907.20 : 7,360.80 = 4,712.80 : x
  2. Step 2: Convert to fraction form
    4,907.20/7,360.80 = 4,712.80/x
  3. Step 3: Cross multiply
    4,907.20x = 7,360.80 × 4,712.80
  4. Step 4: Simplify right side
    4,907.20x = 34,689,978.24
  5. Step 5: Solve for x
    x = 34,689,978.24/4,907.20
  6. Step 6: Final answer
    x = 7,069.20

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