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Finding the Fourth Proportional to 317.40, 472.86 and 301.60

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Solution

The fourth proportional to 317.40, 472.86 and 301.60 is: 449.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.40 : 472.86 = 301.60 : x
  2. Step 2: Convert to fraction form
    317.40/472.86 = 301.60/x
  3. Step 3: Cross multiply
    317.40x = 472.86 × 301.60
  4. Step 4: Simplify right side
    317.40x = 142,614.58
  5. Step 5: Solve for x
    x = 142,614.58/317.40
  6. Step 6: Final answer
    x = 449.32

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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.