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Finding the Fourth Proportional to 418.68, 577.88 and 278.84

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Solution

The fourth proportional to 418.68, 577.88 and 278.84 is: 384.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.68 : 577.88 = 278.84 : x
  2. Step 2: Convert to fraction form
    418.68/577.88 = 278.84/x
  3. Step 3: Cross multiply
    418.68x = 577.88 × 278.84
  4. Step 4: Simplify right side
    418.68x = 161,136.06
  5. Step 5: Solve for x
    x = 161,136.06/418.68
  6. Step 6: Final answer
    x = 384.87

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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.