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Finding the Fourth Proportional to 398,759.85, 549,977.60 and 255,533.22

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Solution

The fourth proportional to 398,759.85, 549,977.60 and 255,533.22 is: 352,436.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,759.85 : 549,977.60 = 255,533.22 : x
  2. Step 2: Convert to fraction form
    398,759.85/549,977.60 = 255,533.22/x
  3. Step 3: Cross multiply
    398,759.85x = 549,977.60 × 255,533.22
  4. Step 4: Simplify right side
    398,759.85x = 140,537,545,778.21
  5. Step 5: Solve for x
    x = 140,537,545,778.21/398,759.85
  6. Step 6: Final answer
    x = 352,436.55

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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.