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Finding the Fourth Proportional to 664,839.70, 996,712.80 and 286,051.30

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Solution

The fourth proportional to 664,839.70, 996,712.80 and 286,051.30 is: 428,841.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,839.70 : 996,712.80 = 286,051.30 : x
  2. Step 2: Convert to fraction form
    664,839.70/996,712.80 = 286,051.30/x
  3. Step 3: Cross multiply
    664,839.70x = 996,712.80 × 286,051.30
  4. Step 4: Simplify right side
    664,839.70x = 285,110,992,166.64
  5. Step 5: Solve for x
    x = 285,110,992,166.64/664,839.70
  6. Step 6: Final answer
    x = 428,841.71

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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.