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Finding the Fourth Proportional to 356.15, 531.36 and 317.17

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Solution

The fourth proportional to 356.15, 531.36 and 317.17 is: 473.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.15 : 531.36 = 317.17 : x
  2. Step 2: Convert to fraction form
    356.15/531.36 = 317.17/x
  3. Step 3: Cross multiply
    356.15x = 531.36 × 317.17
  4. Step 4: Simplify right side
    356.15x = 168,531.45
  5. Step 5: Solve for x
    x = 168,531.45/356.15
  6. Step 6: Final answer
    x = 473.20

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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.