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Finding the Fourth Proportional to 255,979.60, 383,479.80 and 137,611.60

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Solution

The fourth proportional to 255,979.60, 383,479.80 and 137,611.60 is: 206,154.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,979.60 : 383,479.80 = 137,611.60 : x
  2. Step 2: Convert to fraction form
    255,979.60/383,479.80 = 137,611.60/x
  3. Step 3: Cross multiply
    255,979.60x = 383,479.80 × 137,611.60
  4. Step 4: Simplify right side
    255,979.60x = 52,771,268,845.68
  5. Step 5: Solve for x
    x = 52,771,268,845.68/255,979.60
  6. Step 6: Final answer
    x = 206,154.20

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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.