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Finding the Fourth Proportional to 405.60, 558.89 and 375.69

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Solution

The fourth proportional to 405.60, 558.89 and 375.69 is: 517.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.60 : 558.89 = 375.69 : x
  2. Step 2: Convert to fraction form
    405.60/558.89 = 375.69/x
  3. Step 3: Cross multiply
    405.60x = 558.89 × 375.69
  4. Step 4: Simplify right side
    405.60x = 209,969.38
  5. Step 5: Solve for x
    x = 209,969.38/405.60
  6. Step 6: Final answer
    x = 517.68

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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.