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Finding the Fourth Proportional to 496,890.40, 685,654.32 and 279,097.60

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Solution

The fourth proportional to 496,890.40, 685,654.32 and 279,097.60 is: 385,124.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,890.40 : 685,654.32 = 279,097.60 : x
  2. Step 2: Convert to fraction form
    496,890.40/685,654.32 = 279,097.60/x
  3. Step 3: Cross multiply
    496,890.40x = 685,654.32 × 279,097.60
  4. Step 4: Simplify right side
    496,890.40x = 191,364,475,141.63
  5. Step 5: Solve for x
    x = 191,364,475,141.63/496,890.40
  6. Step 6: Final answer
    x = 385,124.11

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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.