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Finding the Fourth Proportional to 478,341.05, 717,512.48 and 449,111.79

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Solution

The fourth proportional to 478,341.05, 717,512.48 and 449,111.79 is: 673,668.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,341.05 : 717,512.48 = 449,111.79 : x
  2. Step 2: Convert to fraction form
    478,341.05/717,512.48 = 449,111.79/x
  3. Step 3: Cross multiply
    478,341.05x = 717,512.48 × 449,111.79
  4. Step 4: Simplify right side
    478,341.05x = 322,243,311,994.58
  5. Step 5: Solve for x
    x = 322,243,311,994.58/478,341.05
  6. Step 6: Final answer
    x = 673,668.54

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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.