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Finding the Fourth Proportional to 390.51, 586.04 and 198.27

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Solution

The fourth proportional to 390.51, 586.04 and 198.27 is: 297.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.51 : 586.04 = 198.27 : x
  2. Step 2: Convert to fraction form
    390.51/586.04 = 198.27/x
  3. Step 3: Cross multiply
    390.51x = 586.04 × 198.27
  4. Step 4: Simplify right side
    390.51x = 116,193.16
  5. Step 5: Solve for x
    x = 116,193.16/390.51
  6. Step 6: Final answer
    x = 297.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.