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Finding the Fourth Proportional to 522.45, 722.70 and 486.99

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Solution

The fourth proportional to 522.45, 722.70 and 486.99 is: 673.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.45 : 722.70 = 486.99 : x
  2. Step 2: Convert to fraction form
    522.45/722.70 = 486.99/x
  3. Step 3: Cross multiply
    522.45x = 722.70 × 486.99
  4. Step 4: Simplify right side
    522.45x = 351,947.67
  5. Step 5: Solve for x
    x = 351,947.67/522.45
  6. Step 6: Final answer
    x = 673.65

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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.