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Finding the Fourth Proportional to 727.68, 1,004.16 and 417.24

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Solution

The fourth proportional to 727.68, 1,004.16 and 417.24 is: 575.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.68 : 1,004.16 = 417.24 : x
  2. Step 2: Convert to fraction form
    727.68/1,004.16 = 417.24/x
  3. Step 3: Cross multiply
    727.68x = 1,004.16 × 417.24
  4. Step 4: Simplify right side
    727.68x = 418,975.72
  5. Step 5: Solve for x
    x = 418,975.72/727.68
  6. Step 6: Final answer
    x = 575.77

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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.