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Finding the Fourth Proportional to 390.69, 586.16 and 244.53

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Solution

The fourth proportional to 390.69, 586.16 and 244.53 is: 366.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.69 : 586.16 = 244.53 : x
  2. Step 2: Convert to fraction form
    390.69/586.16 = 244.53/x
  3. Step 3: Cross multiply
    390.69x = 586.16 × 244.53
  4. Step 4: Simplify right side
    390.69x = 143,335.60
  5. Step 5: Solve for x
    x = 143,335.60/390.69
  6. Step 6: Final answer
    x = 366.88

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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.