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Finding the Fourth Proportional to 402,812.60, 555,895.66 and 221,538.56

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Solution

The fourth proportional to 402,812.60, 555,895.66 and 221,538.56 is: 305,731.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,812.60 : 555,895.66 = 221,538.56 : x
  2. Step 2: Convert to fraction form
    402,812.60/555,895.66 = 221,538.56/x
  3. Step 3: Cross multiply
    402,812.60x = 555,895.66 × 221,538.56
  4. Step 4: Simplify right side
    402,812.60x = 123,152,324,026.65
  5. Step 5: Solve for x
    x = 123,152,324,026.65/402,812.60
  6. Step 6: Final answer
    x = 305,731.06

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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.