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Finding the Fourth Proportional to 638,435.64, 880,884.53 and 420,620.16

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Solution

The fourth proportional to 638,435.64, 880,884.53 and 420,620.16 is: 580,352.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,435.64 : 880,884.53 = 420,620.16 : x
  2. Step 2: Convert to fraction form
    638,435.64/880,884.53 = 420,620.16/x
  3. Step 3: Cross multiply
    638,435.64x = 880,884.53 × 420,620.16
  4. Step 4: Simplify right side
    638,435.64x = 370,517,792,138.68
  5. Step 5: Solve for x
    x = 370,517,792,138.68/638,435.64
  6. Step 6: Final answer
    x = 580,352.62

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1.5x scale

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.