Home / 419,427.20-629,228.16-138,966.40

Finding the Fourth Proportional to 419,427.20, 629,228.16 and 138,966.40

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Solution

The fourth proportional to 419,427.20, 629,228.16 and 138,966.40 is: 208,478.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,427.20 : 629,228.16 = 138,966.40 : x
  2. Step 2: Convert to fraction form
    419,427.20/629,228.16 = 138,966.40/x
  3. Step 3: Cross multiply
    419,427.20x = 629,228.16 × 138,966.40
  4. Step 4: Simplify right side
    419,427.20x = 87,441,572,173.82
  5. Step 5: Solve for x
    x = 87,441,572,173.82/419,427.20
  6. Step 6: Final answer
    x = 208,478.54

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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.