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Finding the Fourth Proportional to 390.44, 586.14 and 370.28

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Solution

The fourth proportional to 390.44, 586.14 and 370.28 is: 555.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.44 : 586.14 = 370.28 : x
  2. Step 2: Convert to fraction form
    390.44/586.14 = 370.28/x
  3. Step 3: Cross multiply
    390.44x = 586.14 × 370.28
  4. Step 4: Simplify right side
    390.44x = 217,035.92
  5. Step 5: Solve for x
    x = 217,035.92/390.44
  6. Step 6: Final answer
    x = 555.88

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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.