Home / 402,939.11-556,057.28-221,664.83

Finding the Fourth Proportional to 402,939.11, 556,057.28 and 221,664.83

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Solution

The fourth proportional to 402,939.11, 556,057.28 and 221,664.83 is: 305,898.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,939.11 : 556,057.28 = 221,664.83 : x
  2. Step 2: Convert to fraction form
    402,939.11/556,057.28 = 221,664.83/x
  3. Step 3: Cross multiply
    402,939.11x = 556,057.28 × 221,664.83
  4. Step 4: Simplify right side
    402,939.11x = 123,258,341,155.82
  5. Step 5: Solve for x
    x = 123,258,341,155.82/402,939.11
  6. Step 6: Final answer
    x = 305,898.18

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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.