Home / 457,929.97-687,039.81-205,427.05

Finding the Fourth Proportional to 457,929.97, 687,039.81 and 205,427.05

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Solution

The fourth proportional to 457,929.97, 687,039.81 and 205,427.05 is: 308,205.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,929.97 : 687,039.81 = 205,427.05 : x
  2. Step 2: Convert to fraction form
    457,929.97/687,039.81 = 205,427.05/x
  3. Step 3: Cross multiply
    457,929.97x = 687,039.81 × 205,427.05
  4. Step 4: Simplify right side
    457,929.97x = 141,136,561,400.86
  5. Step 5: Solve for x
    x = 141,136,561,400.86/457,929.97
  6. Step 6: Final answer
    x = 308,205.56

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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.