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Finding the Fourth Proportional to 915,668, 1,373,880 and 494,447.84

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Solution

The fourth proportional to 915,668, 1,373,880 and 494,447.84 is: 741,875.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,668 : 1,373,880 = 494,447.84 : x
  2. Step 2: Convert to fraction form
    915,668/1,373,880 = 494,447.84/x
  3. Step 3: Cross multiply
    915,668x = 1,373,880 × 494,447.84
  4. Step 4: Simplify right side
    915,668x = 679,311,998,419.20
  5. Step 5: Solve for x
    x = 679,311,998,419.20/915,668
  6. Step 6: Final answer
    x = 741,875.87

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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.