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Finding the Fourth Proportional to 929.67, 1,284.20 and 744.45

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Solution

The fourth proportional to 929.67, 1,284.20 and 744.45 is: 1,028.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.67 : 1,284.20 = 744.45 : x
  2. Step 2: Convert to fraction form
    929.67/1,284.20 = 744.45/x
  3. Step 3: Cross multiply
    929.67x = 1,284.20 × 744.45
  4. Step 4: Simplify right side
    929.67x = 956,018.97
  5. Step 5: Solve for x
    x = 956,018.97/929.67
  6. Step 6: Final answer
    x = 1,028.34

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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.