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Finding the Fourth Proportional to 358.19, 533.72 and 319.89

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Solution

The fourth proportional to 358.19, 533.72 and 319.89 is: 476.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.19 : 533.72 = 319.89 : x
  2. Step 2: Convert to fraction form
    358.19/533.72 = 319.89/x
  3. Step 3: Cross multiply
    358.19x = 533.72 × 319.89
  4. Step 4: Simplify right side
    358.19x = 170,730.09
  5. Step 5: Solve for x
    x = 170,730.09/358.19
  6. Step 6: Final answer
    x = 476.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.