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Finding the Fourth Proportional to 717,342.72, 990,604.80 and 449,537.28

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Solution

The fourth proportional to 717,342.72, 990,604.80 and 449,537.28 is: 620,782.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,342.72 : 990,604.80 = 449,537.28 : x
  2. Step 2: Convert to fraction form
    717,342.72/990,604.80 = 449,537.28/x
  3. Step 3: Cross multiply
    717,342.72x = 990,604.80 × 449,537.28
  4. Step 4: Simplify right side
    717,342.72x = 445,313,787,346.94
  5. Step 5: Solve for x
    x = 445,313,787,346.94/717,342.72
  6. Step 6: Final answer
    x = 620,782.47

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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.