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Finding the Fourth Proportional to 390.70, 586.52 and 182.66

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Solution

The fourth proportional to 390.70, 586.52 and 182.66 is: 274.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.70 : 586.52 = 182.66 : x
  2. Step 2: Convert to fraction form
    390.70/586.52 = 182.66/x
  3. Step 3: Cross multiply
    390.70x = 586.52 × 182.66
  4. Step 4: Simplify right side
    390.70x = 107,133.74
  5. Step 5: Solve for x
    x = 107,133.74/390.70
  6. Step 6: Final answer
    x = 274.21

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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.