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Finding the Fourth Proportional to 485,039.84, 669,361.89 and 278,341.91

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Solution

The fourth proportional to 485,039.84, 669,361.89 and 278,341.91 is: 384,115.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,039.84 : 669,361.89 = 278,341.91 : x
  2. Step 2: Convert to fraction form
    485,039.84/669,361.89 = 278,341.91/x
  3. Step 3: Cross multiply
    485,039.84x = 669,361.89 × 278,341.91
  4. Step 4: Simplify right side
    485,039.84x = 186,311,463,597.00
  5. Step 5: Solve for x
    x = 186,311,463,597.00/485,039.84
  6. Step 6: Final answer
    x = 384,115.80

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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.