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Finding the Fourth Proportional to 482.76, 666.76 and 317.71

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Solution

The fourth proportional to 482.76, 666.76 and 317.71 is: 438.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.76 : 666.76 = 317.71 : x
  2. Step 2: Convert to fraction form
    482.76/666.76 = 317.71/x
  3. Step 3: Cross multiply
    482.76x = 666.76 × 317.71
  4. Step 4: Simplify right side
    482.76x = 211,832.31
  5. Step 5: Solve for x
    x = 211,832.31/482.76
  6. Step 6: Final answer
    x = 438.80

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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.