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Finding the Fourth Proportional to 390.96, 586.02 and 195.57

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Solution

The fourth proportional to 390.96, 586.02 and 195.57 is: 293.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.96 : 586.02 = 195.57 : x
  2. Step 2: Convert to fraction form
    390.96/586.02 = 195.57/x
  3. Step 3: Cross multiply
    390.96x = 586.02 × 195.57
  4. Step 4: Simplify right side
    390.96x = 114,607.93
  5. Step 5: Solve for x
    x = 114,607.93/390.96
  6. Step 6: Final answer
    x = 293.14

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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.