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Finding the Fourth Proportional to 454,439.40, 681,659.12 and 138,893.64

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Solution

The fourth proportional to 454,439.40, 681,659.12 and 138,893.64 is: 208,340.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,439.40 : 681,659.12 = 138,893.64 : x
  2. Step 2: Convert to fraction form
    454,439.40/681,659.12 = 138,893.64/x
  3. Step 3: Cross multiply
    454,439.40x = 681,659.12 × 138,893.64
  4. Step 4: Simplify right side
    454,439.40x = 94,678,116,416.00
  5. Step 5: Solve for x
    x = 94,678,116,416.00/454,439.40
  6. Step 6: Final answer
    x = 208,340.47

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Similar ratio
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1.5x scale

Why These Related Problems?

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