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Finding the Fourth Proportional to 440,790.82, 661,133.67 and 260,983.78

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Solution

The fourth proportional to 440,790.82, 661,133.67 and 260,983.78 is: 391,444.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,790.82 : 661,133.67 = 260,983.78 : x
  2. Step 2: Convert to fraction form
    440,790.82/661,133.67 = 260,983.78/x
  3. Step 3: Cross multiply
    440,790.82x = 661,133.67 × 260,983.78
  4. Step 4: Simplify right side
    440,790.82x = 172,545,164,281.87
  5. Step 5: Solve for x
    x = 172,545,164,281.87/440,790.82
  6. Step 6: Final answer
    x = 391,444.55

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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.