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Finding the Fourth Proportional to 1,055.21, 1,582.41 and 361.68

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Solution

The fourth proportional to 1,055.21, 1,582.41 and 361.68 is: 542.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.21 : 1,582.41 = 361.68 : x
  2. Step 2: Convert to fraction form
    1,055.21/1,582.41 = 361.68/x
  3. Step 3: Cross multiply
    1,055.21x = 1,582.41 × 361.68
  4. Step 4: Simplify right side
    1,055.21x = 572,321.47
  5. Step 5: Solve for x
    x = 572,321.47/1,055.21
  6. Step 6: Final answer
    x = 542.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.