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Finding the Fourth Proportional to 756.11, 1,043.23 and 476.48

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Solution

The fourth proportional to 756.11, 1,043.23 and 476.48 is: 657.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.11 : 1,043.23 = 476.48 : x
  2. Step 2: Convert to fraction form
    756.11/1,043.23 = 476.48/x
  3. Step 3: Cross multiply
    756.11x = 1,043.23 × 476.48
  4. Step 4: Simplify right side
    756.11x = 497,078.23
  5. Step 5: Solve for x
    x = 497,078.23/756.11
  6. Step 6: Final answer
    x = 657.42

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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.