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Finding the Fourth Proportional to 423.42, 579.18 and 417.08

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Solution

The fourth proportional to 423.42, 579.18 and 417.08 is: 570.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.42 : 579.18 = 417.08 : x
  2. Step 2: Convert to fraction form
    423.42/579.18 = 417.08/x
  3. Step 3: Cross multiply
    423.42x = 579.18 × 417.08
  4. Step 4: Simplify right side
    423.42x = 241,561.50
  5. Step 5: Solve for x
    x = 241,561.50/423.42
  6. Step 6: Final answer
    x = 570.50

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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.