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Finding the Fourth Proportional to 667,290.89, 920,865.95 and 361,367.53

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Solution

The fourth proportional to 667,290.89, 920,865.95 and 361,367.53 is: 498,689.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,290.89 : 920,865.95 = 361,367.53 : x
  2. Step 2: Convert to fraction form
    667,290.89/920,865.95 = 361,367.53/x
  3. Step 3: Cross multiply
    667,290.89x = 920,865.95 × 361,367.53
  4. Step 4: Simplify right side
    667,290.89x = 332,771,051,058.73
  5. Step 5: Solve for x
    x = 332,771,051,058.73/667,290.89
  6. Step 6: Final answer
    x = 498,689.63

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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.