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Finding the Fourth Proportional to 718,954.58, 992,273.64 and 428,601.78

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Solution

The fourth proportional to 718,954.58, 992,273.64 and 428,601.78 is: 591,539.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,954.58 : 992,273.64 = 428,601.78 : x
  2. Step 2: Convert to fraction form
    718,954.58/992,273.64 = 428,601.78/x
  3. Step 3: Cross multiply
    718,954.58x = 992,273.64 × 428,601.78
  4. Step 4: Simplify right side
    718,954.58x = 425,290,248,351.08
  5. Step 5: Solve for x
    x = 425,290,248,351.08/718,954.58
  6. Step 6: Final answer
    x = 591,539.80

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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.