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Finding the Fourth Proportional to 667,218.80, 999,467.40 and 413,721.20

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Solution

The fourth proportional to 667,218.80, 999,467.40 and 413,721.20 is: 619,738.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,218.80 : 999,467.40 = 413,721.20 : x
  2. Step 2: Convert to fraction form
    667,218.80/999,467.40 = 413,721.20/x
  3. Step 3: Cross multiply
    667,218.80x = 999,467.40 × 413,721.20
  4. Step 4: Simplify right side
    667,218.80x = 413,500,852,088.88
  5. Step 5: Solve for x
    x = 413,500,852,088.88/667,218.80
  6. Step 6: Final answer
    x = 619,738.01

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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.