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Finding the Fourth Proportional to 481,479.19, 664,327.17 and 285,146.49

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Solution

The fourth proportional to 481,479.19, 664,327.17 and 285,146.49 is: 393,434.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,479.19 : 664,327.17 = 285,146.49 : x
  2. Step 2: Convert to fraction form
    481,479.19/664,327.17 = 285,146.49/x
  3. Step 3: Cross multiply
    481,479.19x = 664,327.17 × 285,146.49
  4. Step 4: Simplify right side
    481,479.19x = 189,430,563,228.36
  5. Step 5: Solve for x
    x = 189,430,563,228.36/481,479.19
  6. Step 6: Final answer
    x = 393,434.58

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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.