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Finding the Fourth Proportional to 756.81, 1,043.89 and 477.39

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Solution

The fourth proportional to 756.81, 1,043.89 and 477.39 is: 658.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.81 : 1,043.89 = 477.39 : x
  2. Step 2: Convert to fraction form
    756.81/1,043.89 = 477.39/x
  3. Step 3: Cross multiply
    756.81x = 1,043.89 × 477.39
  4. Step 4: Simplify right side
    756.81x = 498,345.37
  5. Step 5: Solve for x
    x = 498,345.37/756.81
  6. Step 6: Final answer
    x = 658.48

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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.