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Finding the Fourth Proportional to 727.61, 1,091.06 and 265.06

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Solution

The fourth proportional to 727.61, 1,091.06 and 265.06 is: 397.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.61 : 1,091.06 = 265.06 : x
  2. Step 2: Convert to fraction form
    727.61/1,091.06 = 265.06/x
  3. Step 3: Cross multiply
    727.61x = 1,091.06 × 265.06
  4. Step 4: Simplify right side
    727.61x = 289,190.91
  5. Step 5: Solve for x
    x = 289,190.91/727.61
  6. Step 6: Final answer
    x = 397.46

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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.