Home / 857,057.12-1,283,912.40-407,137.76

Finding the Fourth Proportional to 857,057.12, 1,283,912.40 and 407,137.76

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Solution

The fourth proportional to 857,057.12, 1,283,912.40 and 407,137.76 is: 609,911.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,057.12 : 1,283,912.40 = 407,137.76 : x
  2. Step 2: Convert to fraction form
    857,057.12/1,283,912.40 = 407,137.76/x
  3. Step 3: Cross multiply
    857,057.12x = 1,283,912.40 × 407,137.76
  4. Step 4: Simplify right side
    857,057.12x = 522,729,218,572.22
  5. Step 5: Solve for x
    x = 522,729,218,572.22/857,057.12
  6. Step 6: Final answer
    x = 609,911.76

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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.