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Finding the Fourth Proportional to 419.80, 577.72 and 361.48

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Solution

The fourth proportional to 419.80, 577.72 and 361.48 is: 497.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.80 : 577.72 = 361.48 : x
  2. Step 2: Convert to fraction form
    419.80/577.72 = 361.48/x
  3. Step 3: Cross multiply
    419.80x = 577.72 × 361.48
  4. Step 4: Simplify right side
    419.80x = 208,834.23
  5. Step 5: Solve for x
    x = 208,834.23/419.80
  6. Step 6: Final answer
    x = 497.46

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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.