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Finding the Fourth Proportional to 356.36, 531.69 and 317.38

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Solution

The fourth proportional to 356.36, 531.69 and 317.38 is: 473.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.36 : 531.69 = 317.38 : x
  2. Step 2: Convert to fraction form
    356.36/531.69 = 317.38/x
  3. Step 3: Cross multiply
    356.36x = 531.69 × 317.38
  4. Step 4: Simplify right side
    356.36x = 168,747.77
  5. Step 5: Solve for x
    x = 168,747.77/356.36
  6. Step 6: Final answer
    x = 473.53

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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.