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Finding the Fourth Proportional to 441.92, 610.08 and 390.08

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Solution

The fourth proportional to 441.92, 610.08 and 390.08 is: 538.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.92 : 610.08 = 390.08 : x
  2. Step 2: Convert to fraction form
    441.92/610.08 = 390.08/x
  3. Step 3: Cross multiply
    441.92x = 610.08 × 390.08
  4. Step 4: Simplify right side
    441.92x = 237,980.01
  5. Step 5: Solve for x
    x = 237,980.01/441.92
  6. Step 6: Final answer
    x = 538.51

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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.