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Finding the Fourth Proportional to 402,722.96, 555,769.78 and 221,425.52

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Solution

The fourth proportional to 402,722.96, 555,769.78 and 221,425.52 is: 305,573.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,722.96 : 555,769.78 = 221,425.52 : x
  2. Step 2: Convert to fraction form
    402,722.96/555,769.78 = 221,425.52/x
  3. Step 3: Cross multiply
    402,722.96x = 555,769.78 × 221,425.52
  4. Step 4: Simplify right side
    402,722.96x = 123,061,612,536.79
  5. Step 5: Solve for x
    x = 123,061,612,536.79/402,722.96
  6. Step 6: Final answer
    x = 305,573.87

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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.