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Finding the Fourth Proportional to 668,215.30, 1,002,420.15 and 218,859.70

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Solution

The fourth proportional to 668,215.30, 1,002,420.15 and 218,859.70 is: 328,321.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,215.30 : 1,002,420.15 = 218,859.70 : x
  2. Step 2: Convert to fraction form
    668,215.30/1,002,420.15 = 218,859.70/x
  3. Step 3: Cross multiply
    668,215.30x = 1,002,420.15 × 218,859.70
  4. Step 4: Simplify right side
    668,215.30x = 219,389,373,302.96
  5. Step 5: Solve for x
    x = 219,389,373,302.96/668,215.30
  6. Step 6: Final answer
    x = 328,321.39

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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.