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Finding the Fourth Proportional to 423.70, 584.74 and 276.36

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Solution

The fourth proportional to 423.70, 584.74 and 276.36 is: 381.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.70 : 584.74 = 276.36 : x
  2. Step 2: Convert to fraction form
    423.70/584.74 = 276.36/x
  3. Step 3: Cross multiply
    423.70x = 584.74 × 276.36
  4. Step 4: Simplify right side
    423.70x = 161,598.75
  5. Step 5: Solve for x
    x = 161,598.75/423.70
  6. Step 6: Final answer
    x = 381.40

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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.