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Finding the Fourth Proportional to 418.94, 578.18 and 302.58

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Solution

The fourth proportional to 418.94, 578.18 and 302.58 is: 417.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.94 : 578.18 = 302.58 : x
  2. Step 2: Convert to fraction form
    418.94/578.18 = 302.58/x
  3. Step 3: Cross multiply
    418.94x = 578.18 × 302.58
  4. Step 4: Simplify right side
    418.94x = 174,945.70
  5. Step 5: Solve for x
    x = 174,945.70/418.94
  6. Step 6: Final answer
    x = 417.59

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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.