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Finding the Fourth Proportional to 1,091.43, 1,637.16 and 321.93

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Solution

The fourth proportional to 1,091.43, 1,637.16 and 321.93 is: 482.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.43 : 1,637.16 = 321.93 : x
  2. Step 2: Convert to fraction form
    1,091.43/1,637.16 = 321.93/x
  3. Step 3: Cross multiply
    1,091.43x = 1,637.16 × 321.93
  4. Step 4: Simplify right side
    1,091.43x = 527,050.92
  5. Step 5: Solve for x
    x = 527,050.92/1,091.43
  6. Step 6: Final answer
    x = 482.90

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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.