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Finding the Fourth Proportional to 727.82, 1,004.45 and 417.32

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Solution

The fourth proportional to 727.82, 1,004.45 and 417.32 is: 575.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.82 : 1,004.45 = 417.32 : x
  2. Step 2: Convert to fraction form
    727.82/1,004.45 = 417.32/x
  3. Step 3: Cross multiply
    727.82x = 1,004.45 × 417.32
  4. Step 4: Simplify right side
    727.82x = 419,172.05
  5. Step 5: Solve for x
    x = 419,172.05/727.82
  6. Step 6: Final answer
    x = 575.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.