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Finding the Fourth Proportional to 664,804.80, 996,559.20 and 380,203.20

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Solution

The fourth proportional to 664,804.80, 996,559.20 and 380,203.20 is: 569,934.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,804.80 : 996,559.20 = 380,203.20 : x
  2. Step 2: Convert to fraction form
    664,804.80/996,559.20 = 380,203.20/x
  3. Step 3: Cross multiply
    664,804.80x = 996,559.20 × 380,203.20
  4. Step 4: Simplify right side
    664,804.80x = 378,894,996,829.44
  5. Step 5: Solve for x
    x = 378,894,996,829.44/664,804.80
  6. Step 6: Final answer
    x = 569,934.21

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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.