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Finding the Fourth Proportional to 356.81, 531.87 and 317.57

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Solution

The fourth proportional to 356.81, 531.87 and 317.57 is: 473.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.81 : 531.87 = 317.57 : x
  2. Step 2: Convert to fraction form
    356.81/531.87 = 317.57/x
  3. Step 3: Cross multiply
    356.81x = 531.87 × 317.57
  4. Step 4: Simplify right side
    356.81x = 168,905.96
  5. Step 5: Solve for x
    x = 168,905.96/356.81
  6. Step 6: Final answer
    x = 473.38

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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.