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Finding the Fourth Proportional to 479.99, 716.55 and 418.50

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Solution

The fourth proportional to 479.99, 716.55 and 418.50 is: 624.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.99 : 716.55 = 418.50 : x
  2. Step 2: Convert to fraction form
    479.99/716.55 = 418.50/x
  3. Step 3: Cross multiply
    479.99x = 716.55 × 418.50
  4. Step 4: Simplify right side
    479.99x = 299,874.61
  5. Step 5: Solve for x
    x = 299,874.61/479.99
  6. Step 6: Final answer
    x = 624.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.