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Finding the Fourth Proportional to 684,893.28, 945,232.56 and 398,425.44

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Solution

The fourth proportional to 684,893.28, 945,232.56 and 398,425.44 is: 549,873.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,893.28 : 945,232.56 = 398,425.44 : x
  2. Step 2: Convert to fraction form
    684,893.28/945,232.56 = 398,425.44/x
  3. Step 3: Cross multiply
    684,893.28x = 945,232.56 × 398,425.44
  4. Step 4: Simplify right side
    684,893.28x = 376,604,698,620.33
  5. Step 5: Solve for x
    x = 376,604,698,620.33/684,893.28
  6. Step 6: Final answer
    x = 549,873.55

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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.