Home / 402,338.12-555,236.37-221,061.80

Finding the Fourth Proportional to 402,338.12, 555,236.37 and 221,061.80

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Solution

The fourth proportional to 402,338.12, 555,236.37 and 221,061.80 is: 305,070.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,338.12 : 555,236.37 = 221,061.80 : x
  2. Step 2: Convert to fraction form
    402,338.12/555,236.37 = 221,061.80/x
  3. Step 3: Cross multiply
    402,338.12x = 555,236.37 × 221,061.80
  4. Step 4: Simplify right side
    402,338.12x = 122,741,552,765.76
  5. Step 5: Solve for x
    x = 122,741,552,765.76/402,338.12
  6. Step 6: Final answer
    x = 305,070.66

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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.