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Finding the Fourth Proportional to 402,727.92, 555,750.31 and 221,438.58

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Solution

The fourth proportional to 402,727.92, 555,750.31 and 221,438.58 is: 305,577.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,727.92 : 555,750.31 = 221,438.58 : x
  2. Step 2: Convert to fraction form
    402,727.92/555,750.31 = 221,438.58/x
  3. Step 3: Cross multiply
    402,727.92x = 555,750.31 × 221,438.58
  4. Step 4: Simplify right side
    402,727.92x = 123,064,559,480.96
  5. Step 5: Solve for x
    x = 123,064,559,480.96/402,727.92
  6. Step 6: Final answer
    x = 305,577.42

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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.