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Finding the Fourth Proportional to 419.76, 580.56 and 376.08

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Solution

The fourth proportional to 419.76, 580.56 and 376.08 is: 520.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.76 : 580.56 = 376.08 : x
  2. Step 2: Convert to fraction form
    419.76/580.56 = 376.08/x
  3. Step 3: Cross multiply
    419.76x = 580.56 × 376.08
  4. Step 4: Simplify right side
    419.76x = 218,337.00
  5. Step 5: Solve for x
    x = 218,337.00/419.76
  6. Step 6: Final answer
    x = 520.15

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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.