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Finding the Fourth Proportional to 283,794.15, 393,326.47 and 278,479.74

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Solution

The fourth proportional to 283,794.15, 393,326.47 and 278,479.74 is: 385,960.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,794.15 : 393,326.47 = 278,479.74 : x
  2. Step 2: Convert to fraction form
    283,794.15/393,326.47 = 278,479.74/x
  3. Step 3: Cross multiply
    283,794.15x = 393,326.47 × 278,479.74
  4. Step 4: Simplify right side
    283,794.15x = 109,533,451,144.88
  5. Step 5: Solve for x
    x = 109,533,451,144.88/283,794.15
  6. Step 6: Final answer
    x = 385,960.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.