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Finding the Fourth Proportional to 487,339.64, 672,324.98 and 379,722.84

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Solution

The fourth proportional to 487,339.64, 672,324.98 and 379,722.84 is: 523,858.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,339.64 : 672,324.98 = 379,722.84 : x
  2. Step 2: Convert to fraction form
    487,339.64/672,324.98 = 379,722.84/x
  3. Step 3: Cross multiply
    487,339.64x = 672,324.98 × 379,722.84
  4. Step 4: Simplify right side
    487,339.64x = 255,297,150,808.54
  5. Step 5: Solve for x
    x = 255,297,150,808.54/487,339.64
  6. Step 6: Final answer
    x = 523,858.78

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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.