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Finding the Fourth Proportional to 389,791.20, 584,686.80 and 366,171.60

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Solution

The fourth proportional to 389,791.20, 584,686.80 and 366,171.60 is: 549,257.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,791.20 : 584,686.80 = 366,171.60 : x
  2. Step 2: Convert to fraction form
    389,791.20/584,686.80 = 366,171.60/x
  3. Step 3: Cross multiply
    389,791.20x = 584,686.80 × 366,171.60
  4. Step 4: Simplify right side
    389,791.20x = 214,095,701,054.88
  5. Step 5: Solve for x
    x = 214,095,701,054.88/389,791.20
  6. Step 6: Final answer
    x = 549,257.40

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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.