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Finding the Fourth Proportional to 423.30, 581.05 and 375.63

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Solution

The fourth proportional to 423.30, 581.05 and 375.63 is: 515.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.30 : 581.05 = 375.63 : x
  2. Step 2: Convert to fraction form
    423.30/581.05 = 375.63/x
  3. Step 3: Cross multiply
    423.30x = 581.05 × 375.63
  4. Step 4: Simplify right side
    423.30x = 218,259.81
  5. Step 5: Solve for x
    x = 218,259.81/423.30
  6. Step 6: Final answer
    x = 515.61

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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.