Home / 402,579.85-555,553.97-221,287.90

Finding the Fourth Proportional to 402,579.85, 555,553.97 and 221,287.90

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Solution

The fourth proportional to 402,579.85, 555,553.97 and 221,287.90 is: 305,373.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,579.85 : 555,553.97 = 221,287.90 : x
  2. Step 2: Convert to fraction form
    402,579.85/555,553.97 = 221,287.90/x
  3. Step 3: Cross multiply
    402,579.85x = 555,553.97 × 221,287.90
  4. Step 4: Simplify right side
    402,579.85x = 122,937,370,251.52
  5. Step 5: Solve for x
    x = 122,937,370,251.52/402,579.85
  6. Step 6: Final answer
    x = 305,373.88

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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.