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Finding the Fourth Proportional to 722.15, 996.70 and 427.57

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Solution

The fourth proportional to 722.15, 996.70 and 427.57 is: 590.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.15 : 996.70 = 427.57 : x
  2. Step 2: Convert to fraction form
    722.15/996.70 = 427.57/x
  3. Step 3: Cross multiply
    722.15x = 996.70 × 427.57
  4. Step 4: Simplify right side
    722.15x = 426,159.02
  5. Step 5: Solve for x
    x = 426,159.02/722.15
  6. Step 6: Final answer
    x = 590.13

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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.