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Finding the Fourth Proportional to 727.04, 1,090.64 and 214.08

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Solution

The fourth proportional to 727.04, 1,090.64 and 214.08 is: 321.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.04 : 1,090.64 = 214.08 : x
  2. Step 2: Convert to fraction form
    727.04/1,090.64 = 214.08/x
  3. Step 3: Cross multiply
    727.04x = 1,090.64 × 214.08
  4. Step 4: Simplify right side
    727.04x = 233,484.21
  5. Step 5: Solve for x
    x = 233,484.21/727.04
  6. Step 6: Final answer
    x = 321.14

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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.