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Finding the Fourth Proportional to 727.06, 1,090.90 and 402.05

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Solution

The fourth proportional to 727.06, 1,090.90 and 402.05 is: 603.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.06 : 1,090.90 = 402.05 : x
  2. Step 2: Convert to fraction form
    727.06/1,090.90 = 402.05/x
  3. Step 3: Cross multiply
    727.06x = 1,090.90 × 402.05
  4. Step 4: Simplify right side
    727.06x = 438,596.35
  5. Step 5: Solve for x
    x = 438,596.35/727.06
  6. Step 6: Final answer
    x = 603.25

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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.