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Finding the Fourth Proportional to 455,197.55, 628,078.83 and 261,567.85

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Solution

The fourth proportional to 455,197.55, 628,078.83 and 261,567.85 is: 360,909.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,197.55 : 628,078.83 = 261,567.85 : x
  2. Step 2: Convert to fraction form
    455,197.55/628,078.83 = 261,567.85/x
  3. Step 3: Cross multiply
    455,197.55x = 628,078.83 × 261,567.85
  4. Step 4: Simplify right side
    455,197.55x = 164,285,226,053.22
  5. Step 5: Solve for x
    x = 164,285,226,053.22/455,197.55
  6. Step 6: Final answer
    x = 360,909.74

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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.