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Finding the Fourth Proportional to 404.71, 557.88 and 317.23

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Solution

The fourth proportional to 404.71, 557.88 and 317.23 is: 437.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.71 : 557.88 = 317.23 : x
  2. Step 2: Convert to fraction form
    404.71/557.88 = 317.23/x
  3. Step 3: Cross multiply
    404.71x = 557.88 × 317.23
  4. Step 4: Simplify right side
    404.71x = 176,976.27
  5. Step 5: Solve for x
    x = 176,976.27/404.71
  6. Step 6: Final answer
    x = 437.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.