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Finding the Fourth Proportional to 317.88, 476.88 and 313.84

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Solution

The fourth proportional to 317.88, 476.88 and 313.84 is: 470.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.88 : 476.88 = 313.84 : x
  2. Step 2: Convert to fraction form
    317.88/476.88 = 313.84/x
  3. Step 3: Cross multiply
    317.88x = 476.88 × 313.84
  4. Step 4: Simplify right side
    317.88x = 149,664.02
  5. Step 5: Solve for x
    x = 149,664.02/317.88
  6. Step 6: Final answer
    x = 470.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.