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Finding the Fourth Proportional to 423.76, 579.60 and 417.04

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Solution

The fourth proportional to 423.76, 579.60 and 417.04 is: 570.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.76 : 579.60 = 417.04 : x
  2. Step 2: Convert to fraction form
    423.76/579.60 = 417.04/x
  3. Step 3: Cross multiply
    423.76x = 579.60 × 417.04
  4. Step 4: Simplify right side
    423.76x = 241,716.38
  5. Step 5: Solve for x
    x = 241,716.38/423.76
  6. Step 6: Final answer
    x = 570.41

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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.