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Finding the Fourth Proportional to 664,469.20, 917,055.12 and 377,933.95

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Solution

The fourth proportional to 664,469.20, 917,055.12 and 377,933.95 is: 521,598.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,469.20 : 917,055.12 = 377,933.95 : x
  2. Step 2: Convert to fraction form
    664,469.20/917,055.12 = 377,933.95/x
  3. Step 3: Cross multiply
    664,469.20x = 917,055.12 × 377,933.95
  4. Step 4: Simplify right side
    664,469.20x = 346,586,263,869.32
  5. Step 5: Solve for x
    x = 346,586,263,869.32/664,469.20
  6. Step 6: Final answer
    x = 521,598.69

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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.