Home / 412,473.18-618,908.49-212,802.78

Finding the Fourth Proportional to 412,473.18, 618,908.49 and 212,802.78

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Solution

The fourth proportional to 412,473.18, 618,908.49 and 212,802.78 is: 319,306.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,473.18 : 618,908.49 = 212,802.78 : x
  2. Step 2: Convert to fraction form
    412,473.18/618,908.49 = 212,802.78/x
  3. Step 3: Cross multiply
    412,473.18x = 618,908.49 × 212,802.78
  4. Step 4: Simplify right side
    412,473.18x = 131,705,447,237.60
  5. Step 5: Solve for x
    x = 131,705,447,237.60/412,473.18
  6. Step 6: Final answer
    x = 319,306.69

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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.