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Finding the Fourth Proportional to 389.08, 582.36 and 380.26

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Solution

The fourth proportional to 389.08, 582.36 and 380.26 is: 569.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.08 : 582.36 = 380.26 : x
  2. Step 2: Convert to fraction form
    389.08/582.36 = 380.26/x
  3. Step 3: Cross multiply
    389.08x = 582.36 × 380.26
  4. Step 4: Simplify right side
    389.08x = 221,448.21
  5. Step 5: Solve for x
    x = 221,448.21/389.08
  6. Step 6: Final answer
    x = 569.16

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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.