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Finding the Fourth Proportional to 418.86, 575.55 and 375.12

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Solution

The fourth proportional to 418.86, 575.55 and 375.12 is: 515.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.86 : 575.55 = 375.12 : x
  2. Step 2: Convert to fraction form
    418.86/575.55 = 375.12/x
  3. Step 3: Cross multiply
    418.86x = 575.55 × 375.12
  4. Step 4: Simplify right side
    418.86x = 215,900.32
  5. Step 5: Solve for x
    x = 215,900.32/418.86
  6. Step 6: Final answer
    x = 515.45

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.