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Finding the Fourth Proportional to 722.96, 1,078.32 and 608.16

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Solution

The fourth proportional to 722.96, 1,078.32 and 608.16 is: 907.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.96 : 1,078.32 = 608.16 : x
  2. Step 2: Convert to fraction form
    722.96/1,078.32 = 608.16/x
  3. Step 3: Cross multiply
    722.96x = 1,078.32 × 608.16
  4. Step 4: Simplify right side
    722.96x = 655,791.09
  5. Step 5: Solve for x
    x = 655,791.09/722.96
  6. Step 6: Final answer
    x = 907.09

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.