Home / 426,384.27-639,352.85-212,923.35

Finding the Fourth Proportional to 426,384.27, 639,352.85 and 212,923.35

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Solution

The fourth proportional to 426,384.27, 639,352.85 and 212,923.35 is: 319,273.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,384.27 : 639,352.85 = 212,923.35 : x
  2. Step 2: Convert to fraction form
    426,384.27/639,352.85 = 212,923.35/x
  3. Step 3: Cross multiply
    426,384.27x = 639,352.85 × 212,923.35
  4. Step 4: Simplify right side
    426,384.27x = 136,133,149,589.43
  5. Step 5: Solve for x
    x = 136,133,149,589.43/426,384.27
  6. Step 6: Final answer
    x = 319,273.39

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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.