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Finding the Fourth Proportional to 221,471.79, 331,709.11 and 155,207.74

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Solution

The fourth proportional to 221,471.79, 331,709.11 and 155,207.74 is: 232,462.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,471.79 : 331,709.11 = 155,207.74 : x
  2. Step 2: Convert to fraction form
    221,471.79/331,709.11 = 155,207.74/x
  3. Step 3: Cross multiply
    221,471.79x = 331,709.11 × 155,207.74
  4. Step 4: Simplify right side
    221,471.79x = 51,483,821,300.51
  5. Step 5: Solve for x
    x = 51,483,821,300.51/221,471.79
  6. Step 6: Final answer
    x = 232,462.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.