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Finding the Fourth Proportional to 773.36, 1,068.36 and 669.68

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Solution

The fourth proportional to 773.36, 1,068.36 and 669.68 is: 925.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.36 : 1,068.36 = 669.68 : x
  2. Step 2: Convert to fraction form
    773.36/1,068.36 = 669.68/x
  3. Step 3: Cross multiply
    773.36x = 1,068.36 × 669.68
  4. Step 4: Simplify right side
    773.36x = 715,459.32
  5. Step 5: Solve for x
    x = 715,459.32/773.36
  6. Step 6: Final answer
    x = 925.13

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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.