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Finding the Fourth Proportional to 929.36, 1,393.49 and 496.28

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Solution

The fourth proportional to 929.36, 1,393.49 and 496.28 is: 744.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.36 : 1,393.49 = 496.28 : x
  2. Step 2: Convert to fraction form
    929.36/1,393.49 = 496.28/x
  3. Step 3: Cross multiply
    929.36x = 1,393.49 × 496.28
  4. Step 4: Simplify right side
    929.36x = 691,555.49
  5. Step 5: Solve for x
    x = 691,555.49/929.36
  6. Step 6: Final answer
    x = 744.12

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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.