Home / 345,520.14-517,109.85-212,484.78

Finding the Fourth Proportional to 345,520.14, 517,109.85 and 212,484.78

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Solution

The fourth proportional to 345,520.14, 517,109.85 and 212,484.78 is: 318,007.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,520.14 : 517,109.85 = 212,484.78 : x
  2. Step 2: Convert to fraction form
    345,520.14/517,109.85 = 212,484.78/x
  3. Step 3: Cross multiply
    345,520.14x = 517,109.85 × 212,484.78
  4. Step 4: Simplify right side
    345,520.14x = 109,877,972,713.08
  5. Step 5: Solve for x
    x = 109,877,972,713.08/345,520.14
  6. Step 6: Final answer
    x = 318,007.43

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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.