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Finding the Fourth Proportional to 289,693.30, 434,539.95 and 279,195.70

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Solution

The fourth proportional to 289,693.30, 434,539.95 and 279,195.70 is: 418,793.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,693.30 : 434,539.95 = 279,195.70 : x
  2. Step 2: Convert to fraction form
    289,693.30/434,539.95 = 279,195.70/x
  3. Step 3: Cross multiply
    289,693.30x = 434,539.95 × 279,195.70
  4. Step 4: Simplify right side
    289,693.30x = 121,321,685,518.22
  5. Step 5: Solve for x
    x = 121,321,685,518.22/289,693.30
  6. Step 6: Final answer
    x = 418,793.55

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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.