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Finding the Fourth Proportional to 596.87, 821.95 and 486.61

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Solution

The fourth proportional to 596.87, 821.95 and 486.61 is: 670.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    596.87 : 821.95 = 486.61 : x
  2. Step 2: Convert to fraction form
    596.87/821.95 = 486.61/x
  3. Step 3: Cross multiply
    596.87x = 821.95 × 486.61
  4. Step 4: Simplify right side
    596.87x = 399,965.82
  5. Step 5: Solve for x
    x = 399,965.82/596.87
  6. Step 6: Final answer
    x = 670.11

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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.