Home / 426,795.12-640,261.80-131,238

Finding the Fourth Proportional to 426,795.12, 640,261.80 and 131,238

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Solution

The fourth proportional to 426,795.12, 640,261.80 and 131,238 is: 196,878.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,795.12 : 640,261.80 = 131,238 : x
  2. Step 2: Convert to fraction form
    426,795.12/640,261.80 = 131,238/x
  3. Step 3: Cross multiply
    426,795.12x = 640,261.80 × 131,238
  4. Step 4: Simplify right side
    426,795.12x = 84,026,678,108.40
  5. Step 5: Solve for x
    x = 84,026,678,108.40/426,795.12
  6. Step 6: Final answer
    x = 196,878.25

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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.