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Finding the Fourth Proportional to 376.09, 518.40 and 317.16

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Solution

The fourth proportional to 376.09, 518.40 and 317.16 is: 437.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.09 : 518.40 = 317.16 : x
  2. Step 2: Convert to fraction form
    376.09/518.40 = 317.16/x
  3. Step 3: Cross multiply
    376.09x = 518.40 × 317.16
  4. Step 4: Simplify right side
    376.09x = 164,415.74
  5. Step 5: Solve for x
    x = 164,415.74/376.09
  6. Step 6: Final answer
    x = 437.17

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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.