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Finding the Fourth Proportional to 413,975.60, 620,963.40 and 389,481.20

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Solution

The fourth proportional to 413,975.60, 620,963.40 and 389,481.20 is: 584,221.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,975.60 : 620,963.40 = 389,481.20 : x
  2. Step 2: Convert to fraction form
    413,975.60/620,963.40 = 389,481.20/x
  3. Step 3: Cross multiply
    413,975.60x = 620,963.40 × 389,481.20
  4. Step 4: Simplify right side
    413,975.60x = 241,853,570,188.08
  5. Step 5: Solve for x
    x = 241,853,570,188.08/413,975.60
  6. Step 6: Final answer
    x = 584,221.80

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1.5x scale

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.