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Finding the Fourth Proportional to 722.19, 996.56 and 427.40

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Solution

The fourth proportional to 722.19, 996.56 and 427.40 is: 589.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.19 : 996.56 = 427.40 : x
  2. Step 2: Convert to fraction form
    722.19/996.56 = 427.40/x
  3. Step 3: Cross multiply
    722.19x = 996.56 × 427.40
  4. Step 4: Simplify right side
    722.19x = 425,929.74
  5. Step 5: Solve for x
    x = 425,929.74/722.19
  6. Step 6: Final answer
    x = 589.78

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1.5x scale

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.