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Finding the Fourth Proportional to 384.46, 579.29 and 317.49

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Solution

The fourth proportional to 384.46, 579.29 and 317.49 is: 478.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.46 : 579.29 = 317.49 : x
  2. Step 2: Convert to fraction form
    384.46/579.29 = 317.49/x
  3. Step 3: Cross multiply
    384.46x = 579.29 × 317.49
  4. Step 4: Simplify right side
    384.46x = 183,914.30
  5. Step 5: Solve for x
    x = 183,914.30/384.46
  6. Step 6: Final answer
    x = 478.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.