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Finding the Fourth Proportional to 358, 539.44 and 318.71

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Solution

The fourth proportional to 358, 539.44 and 318.71 is: 480.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    358 : 539.44 = 318.71 : x
  2. Step 2: Convert to fraction form
    358/539.44 = 318.71/x
  3. Step 3: Cross multiply
    358x = 539.44 × 318.71
  4. Step 4: Simplify right side
    358x = 171,924.92
  5. Step 5: Solve for x
    x = 171,924.92/358
  6. Step 6: Final answer
    x = 480.24

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.