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Finding the Fourth Proportional to 312,319.20, 468,480 and 75,661.44

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Solution

The fourth proportional to 312,319.20, 468,480 and 75,661.44 is: 113,492.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,319.20 : 468,480 = 75,661.44 : x
  2. Step 2: Convert to fraction form
    312,319.20/468,480 = 75,661.44/x
  3. Step 3: Cross multiply
    312,319.20x = 468,480 × 75,661.44
  4. Step 4: Simplify right side
    312,319.20x = 35,445,871,411.20
  5. Step 5: Solve for x
    x = 35,445,871,411.20/312,319.20
  6. Step 6: Final answer
    x = 113,492.45

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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.