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Finding the Fourth Proportional to 668,218.80, 1,002,425.40 and 218,830.80

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Solution

The fourth proportional to 668,218.80, 1,002,425.40 and 218,830.80 is: 328,278.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,218.80 : 1,002,425.40 = 218,830.80 : x
  2. Step 2: Convert to fraction form
    668,218.80/1,002,425.40 = 218,830.80/x
  3. Step 3: Cross multiply
    668,218.80x = 1,002,425.40 × 218,830.80
  4. Step 4: Simplify right side
    668,218.80x = 219,361,552,222.32
  5. Step 5: Solve for x
    x = 219,361,552,222.32/668,218.80
  6. Step 6: Final answer
    x = 328,278.03

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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.