Home / 428,844.80-643,267.20-192,648.80

Finding the Fourth Proportional to 428,844.80, 643,267.20 and 192,648.80

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Solution

The fourth proportional to 428,844.80, 643,267.20 and 192,648.80 is: 288,973.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,844.80 : 643,267.20 = 192,648.80 : x
  2. Step 2: Convert to fraction form
    428,844.80/643,267.20 = 192,648.80/x
  3. Step 3: Cross multiply
    428,844.80x = 643,267.20 × 192,648.80
  4. Step 4: Simplify right side
    428,844.80x = 123,924,654,159.36
  5. Step 5: Solve for x
    x = 123,924,654,159.36/428,844.80
  6. Step 6: Final answer
    x = 288,973.20

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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.