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Finding the Fourth Proportional to 722.15, 1,083.48 and 357.19

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Solution

The fourth proportional to 722.15, 1,083.48 and 357.19 is: 535.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.15 : 1,083.48 = 357.19 : x
  2. Step 2: Convert to fraction form
    722.15/1,083.48 = 357.19/x
  3. Step 3: Cross multiply
    722.15x = 1,083.48 × 357.19
  4. Step 4: Simplify right side
    722.15x = 387,008.22
  5. Step 5: Solve for x
    x = 387,008.22/722.15
  6. Step 6: Final answer
    x = 535.91

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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.