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Finding the Fourth Proportional to 482.21, 722.99 and 317.48

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Solution

The fourth proportional to 482.21, 722.99 and 317.48 is: 476.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.21 : 722.99 = 317.48 : x
  2. Step 2: Convert to fraction form
    482.21/722.99 = 317.48/x
  3. Step 3: Cross multiply
    482.21x = 722.99 × 317.48
  4. Step 4: Simplify right side
    482.21x = 229,533.93
  5. Step 5: Solve for x
    x = 229,533.93/482.21
  6. Step 6: Final answer
    x = 476.01

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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.