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Finding the Fourth Proportional to 402,451.01, 555,371.20 and 221,162.88

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Solution

The fourth proportional to 402,451.01, 555,371.20 and 221,162.88 is: 305,198.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,451.01 : 555,371.20 = 221,162.88 : x
  2. Step 2: Convert to fraction form
    402,451.01/555,371.20 = 221,162.88/x
  3. Step 3: Cross multiply
    402,451.01x = 555,371.20 × 221,162.88
  4. Step 4: Simplify right side
    402,451.01x = 122,827,494,061.06
  5. Step 5: Solve for x
    x = 122,827,494,061.06/402,451.01
  6. Step 6: Final answer
    x = 305,198.62

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1.5x scale

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.