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Finding the Fourth Proportional to 402,628.34, 555,633.96 and 221,347.82

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Solution

The fourth proportional to 402,628.34, 555,633.96 and 221,347.82 is: 305,463.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,628.34 : 555,633.96 = 221,347.82 : x
  2. Step 2: Convert to fraction form
    402,628.34/555,633.96 = 221,347.82/x
  3. Step 3: Cross multiply
    402,628.34x = 555,633.96 × 221,347.82
  4. Step 4: Simplify right side
    402,628.34x = 122,988,365,763.97
  5. Step 5: Solve for x
    x = 122,988,365,763.97/402,628.34
  6. Step 6: Final answer
    x = 305,463.76

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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.