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Finding the Fourth Proportional to 418,403.58, 577,674.99 and 321,434.73

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Solution

The fourth proportional to 418,403.58, 577,674.99 and 321,434.73 is: 443,793.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,403.58 : 577,674.99 = 321,434.73 : x
  2. Step 2: Convert to fraction form
    418,403.58/577,674.99 = 321,434.73/x
  3. Step 3: Cross multiply
    418,403.58x = 577,674.99 × 321,434.73
  4. Step 4: Simplify right side
    418,403.58x = 185,684,804,438.40
  5. Step 5: Solve for x
    x = 185,684,804,438.40/418,403.58
  6. Step 6: Final answer
    x = 443,793.54

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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.