Home / 389,141.12-536,991.60-225,785

Finding the Fourth Proportional to 389,141.12, 536,991.60 and 225,785

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Solution

The fourth proportional to 389,141.12, 536,991.60 and 225,785 is: 311,569.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,141.12 : 536,991.60 = 225,785 : x
  2. Step 2: Convert to fraction form
    389,141.12/536,991.60 = 225,785/x
  3. Step 3: Cross multiply
    389,141.12x = 536,991.60 × 225,785
  4. Step 4: Simplify right side
    389,141.12x = 121,244,648,406
  5. Step 5: Solve for x
    x = 121,244,648,406/389,141.12
  6. Step 6: Final answer
    x = 311,569.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.