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Finding the Fourth Proportional to 398,987.42, 550,104.63 and 255,511.58

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Solution

The fourth proportional to 398,987.42, 550,104.63 and 255,511.58 is: 352,287.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,987.42 : 550,104.63 = 255,511.58 : x
  2. Step 2: Convert to fraction form
    398,987.42/550,104.63 = 255,511.58/x
  3. Step 3: Cross multiply
    398,987.42x = 550,104.63 × 255,511.58
  4. Step 4: Simplify right side
    398,987.42x = 140,558,103,176.62
  5. Step 5: Solve for x
    x = 140,558,103,176.62/398,987.42
  6. Step 6: Final answer
    x = 352,287.06

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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.