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Finding the Fourth Proportional to 482.94, 665.68 and 419.76

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Solution

The fourth proportional to 482.94, 665.68 and 419.76 is: 578.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.94 : 665.68 = 419.76 : x
  2. Step 2: Convert to fraction form
    482.94/665.68 = 419.76/x
  3. Step 3: Cross multiply
    482.94x = 665.68 × 419.76
  4. Step 4: Simplify right side
    482.94x = 279,425.84
  5. Step 5: Solve for x
    x = 279,425.84/482.94
  6. Step 6: Final answer
    x = 578.59

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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.