Home / 421,239.04-631,891.20-140,757.28

Finding the Fourth Proportional to 421,239.04, 631,891.20 and 140,757.28

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Solution

The fourth proportional to 421,239.04, 631,891.20 and 140,757.28 is: 211,146.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,239.04 : 631,891.20 = 140,757.28 : x
  2. Step 2: Convert to fraction form
    421,239.04/631,891.20 = 140,757.28/x
  3. Step 3: Cross multiply
    421,239.04x = 631,891.20 × 140,757.28
  4. Step 4: Simplify right side
    421,239.04x = 88,943,286,567.94
  5. Step 5: Solve for x
    x = 88,943,286,567.94/421,239.04
  6. Step 6: Final answer
    x = 211,146.83

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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.