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Finding the Fourth Proportional to 638,479.44, 881,107.60 and 352,009.78

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Solution

The fourth proportional to 638,479.44, 881,107.60 and 352,009.78 is: 485,776.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,479.44 : 881,107.60 = 352,009.78 : x
  2. Step 2: Convert to fraction form
    638,479.44/881,107.60 = 352,009.78/x
  3. Step 3: Cross multiply
    638,479.44x = 881,107.60 × 352,009.78
  4. Step 4: Simplify right side
    638,479.44x = 310,158,492,432.33
  5. Step 5: Solve for x
    x = 310,158,492,432.33/638,479.44
  6. Step 6: Final answer
    x = 485,776.79

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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.