Home / 426,100.08-638,362.80-215,234.40

Finding the Fourth Proportional to 426,100.08, 638,362.80 and 215,234.40

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Solution

The fourth proportional to 426,100.08, 638,362.80 and 215,234.40 is: 322,453.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,100.08 : 638,362.80 = 215,234.40 : x
  2. Step 2: Convert to fraction form
    426,100.08/638,362.80 = 215,234.40/x
  3. Step 3: Cross multiply
    426,100.08x = 638,362.80 × 215,234.40
  4. Step 4: Simplify right side
    426,100.08x = 137,397,634,240.32
  5. Step 5: Solve for x
    x = 137,397,634,240.32/426,100.08
  6. Step 6: Final answer
    x = 322,453.90

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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.